We live in a magnificent world inhabited by approximately 8,700,000 species. This number includes only general species, not subspecies. Scientists discover around 2,500 new species every year, and the number is soon estimated to reach 10 million.

All living organisms are blessed with unique bodies, systems, and organs, defense and protection mechanisms to survive and protect themselves, and special features to help them forage for food.

When people get ill due to environmental effects or malnutrition they usually consult a doctor. They try to find a cure by using the medicine prescribed by doctors. However, animals living in the wild don’t have this option. When animals living in nature or on the street get ill what can they do if nobody takes them to a vet? How do millions of species get well and find cures for their ailments?

You might think that animals who become sick in the wild must simply live with their symptoms, but this is not the case. In fact, we have given a clue at the introduction: each organism is equipped with features to lead a self-sustaining life. Either their bodily functions perfectly enable them to live in their habitat or their unique metabolisms protect them from harmful external factors. Animals also can use some plants whose health benefits have only recently been discovered by humans.

In recent decades, there has been a growing interest for herbal products such as walnut leaf, cherry stalk tangerine rind, grenadine red, and celery root to find cure for diseases.

Animals perform amazing tasks with mind-blowing adroitness as if each were an expert chemist. Wondrous mechanisms are activated when a need arises to protect animals from harm.

Some plants with healing properties:

Lupine, quassia, bitter wood, hemlock, fishberry, roselle, henbane, giant fennel root, pistachio, resin, pine turpentine, mistletoe, cumin, hibiscus, hibiscus flower, alkanet, flos elaeagni, camphor, cardamom, St John’s wort, French lavender, Flaxseed, linseed oil, henna tree, quillaia, wall germander, cranberry, aspand, daffodil, water lily, common balm and eucalyptus.

Animals have been consuming and finding cures in these plants since the dawn of time. They are also equipped with many surviving capabilities under extremely severe conditions. Here are a few examples:

Antibiotics expert

With a height of up to five meters, the giraffe is the tallest land animal. Scientists who investigated the scent emitted by the giraffe found 11 separate chemical substances in its fur. The chemicals turned out to have antibiotic properties, having an increased efficiency when combined. Only after a series of experiments can these incredibly complex chemicals be extracted in the laboratory. The giraffe has been using these chemicals to prevent fungi and bacteria, repel ticks, and stop the growth of germs. Where did these tall creatures study chemistry to know how to produce antibiotics such as indole?

The stubborn doctor

The bezoar ibex is a type of mountain goat native to Turkey, Iran, Turkmenistan and Pakistan. It has a motley coat of black, brown, grey, reddish-gold, and white. Both the male and female have horns and a goatee. The name means “cure” in Persian, and the locals must have noticed its habit of eating spurge whenever bitten by a snake. Scientists have identified the substance called euphorbone in the spurge plant. Amazingly, an analysis of this substance reveals that certain chemical reactions triggered by euphorbone neutralize the effects of venom. The poisoned creature looks for splurge from among the vegetation, self-medicates, and treats itself free of charge. It sure is no wonder when one realizes that the goat, the snake, and the plant are all created by the same hand.

The master of diving

Divers who ascend too quickly to the surface run the high risk of experiencing the bends, an intense pain that is likely to kill because of the gasses coming out of the bloodstream. But how do billions of creatures that lack oxygen tubes lead their entire lives in the sea without experiencing the bends?

Dolphins and whales, for example, descend to depths humans can’t reach on their own and then rise like it is no big deal. Human lungs cannot endure the pressure under such depths, but the bronchi and air sacs in the lungs of dolphins, however, are placed inside a protective cover of special cartilage. To avoid suffering the bends, dolphins release all the air in their lungs before diving deep. But how then do they breathe? The answer is hidden in their muscles, or rather in the myoglobin protein that is available in much higher amounts than in humans. These proteins have the ability to hold in high amounts of oxygen molecules. The much needed oxygen is provided from this source, enabling dolphins and whales to dive as deep as possible.

Poison for one, food for another

The macaw is an inhabitant of American tropical regions with an average wing span of 80 cm. It is known to be a tough creature that lives as long as 60 years. The macaw feeds on plants that produce a chemical called strychnine (C₂₁H₂₂N₂O₂), a powerful poison intended to ward off enemies. How can a substance that kills some living things nourish others? Immediately after eating the nutritious but poisonous seeds, the macaw flies to the rocky cliffs in a certain area. When they get there, they gnaw at and swallow some clay-based rock pieces. The fact that the bird ingests clay without any apparent reason is quite an interesting behavior. The reason was revealed only after research into the origins of the behavior. It turns out that the rocks that have clay in them include a substance called kaolinite (Al₂O₃.2SiO₂.2H₂O) that can absorb the poison in the seeds. The macaw can digest the normally poisonous seeds thanks to this absorption and live on with its life safely. There is no way the macaw can know about the substances present in the clay, so how does it know to eat the clay that can eliminate toxins?

The antifreeze expert

The arctic beetle survives against the inhospitable cold of the arctic thanks to a type of alcohol produced in its body that works as antifreeze. The glycerol (C₃H₈O₃), also called glycerin, produced by the insect prevents the blood and other fluid molecules from freezing and thus ice crystals from killing the cells and destroying cellular bonds. Furthermore, the shorter the days and the colder the weather, the more resistant the bodily mechanisms of the arctic beetle become. As the temperature drops, the volume of water in their body is reduced and antifreeze substances such as glycerol and sorbitol are produced in greater amounts. Research on this amazing creature has revealed that it can survive in temperatures as low as -87 degrees Celsius due to glycerol. It is beyond reason to expect an insect to know how to produce an organic compound with the complex formula of C₃H₈O₃ and thus protect itself from extreme cold.

The radiation expert

Scientists analyzed a surviving scorpion after an atomic bomb test, yet they couldn’t find a satisfying answer to how this animal survived the radiation shower that exterminated all other living organisms. Note that scorpions which came into existence millions of years ago are basically living fossils. Thanks to the protective system they are blessed with, in the past they have survived more powerful solar explosions and harmful radiation from outer space and the sun, and handed down these features to future generations.

The creature that never feels cold

The tardigrade, or water bear, is one of the most resistant organisms in nature.

The size of a pinhead, these microorganisms have pin-shaped hoses in their mouth.  These microorganisms have a brain, a pair of eyes, and a digestion system, but they do not have a heart or lungs.  600 different subspecies of the animal have been discovered so far. They feed mostly on moss and lichens and can survive in any environment including space.

They have been observed to survive a temperature of 120 ⁰C and a pressure of 1000 atm. In dry environments they contract, causing the water in their tissues to evaporate. During this process, the oxygen consumption of the tardigrade virtually stops. The wind carries the dried tardigrades to other places and when they find a suitable environment (wet moss or humid places) they can come back to life again.

According to Ingemar Jönsson from Kristianstadt University in Sweden who participated in studies on this organism, it is a mystery how these animals survive even when they are subjected to conditions in outer space.

Animals perform amazing tasks with mind-blowing adroitness as if each were an expert chemist. Wondrous mechanisms are activated when a need arises to protect animals from harm. It is wondrous to see how animals can carry out these complex chemical procedures as if they have been instructed at birth.

Resurrection plants are desiccation (extreme dryness) tolerant plant species. All are relatively small and mostly found in Southern Africa, North America, Brazil, and Australia. They are able to stay in a dehydrated state under conditions in which other plants would perish. They come back to life and resume their physiological activities when water becomes available again. During the dehydration process, leaves of resurrection plants shrink and curl up due to water loss. Some of them fold up their stems into a tight ball as they desiccate to limit surface area and conserve internal moisture. It is not yet clear how the leaves and stems reduce their size. However, electron microscopy revealed desiccation-induced cell wall folding in the majority of mesophyll and epidermal cells of a resurrection plant. Thick-walled vascular tissue did not fold and supported the surrounding tissue, thereby limiting the extent of leaf shrinkage and allowing leaf morphology to be rapidly regained upon rehydration (Moore et al 2006, 651–62). When the resurrection plant is dehydrated, its stomatal conductance and intercellular CO2 concentration is decreased and hence its photosynthetic rate, but sugar, starch and non-structural carbohydrate reserves increased during this stage. Mature tissues of resurrection plants such as leaves and roots are able to remain in the air-dried state for months by reaching an inactive state, comparable to dormancy in seeds in several aspects. All metabolic functions are reduced to a bare minimum and they appear to be dead. Resurrection plants take immediate advantage of rainfall after dry periods: they absorb water, grow rapidly, and reproduce (Bartels 2005, 696–701; Xu 2010, 183–190).

One of the most common examples of resurrection plants is Myrothamnus flabellifolia, grown in southern Africa, the only known woody resurrection plant. Craterostigma wilmsii and Xerophyta viscosa are other resurrection plants from southern Africa. All these plants are used extensively in African medicine and traditional culture. Ramonda serbica and her sister Haberlea rhodopensis are members of Gesneriaceae family from the Balkan peninsula; they are rare and forbidden for collecting. Anastatica hierochuntica is native to western Asia, while Selaginella lepidophylla is collected from the wilderness of the southwestern United States and Mexico, sold to tourists, and exported worldwide—it can even be bought online, in their dry and lifeless form. After buying this plant, we soak it in water and voila! If one does not have a “green thumb” and still want to have greenery in one’s home, this resurrection plant might work best for you. However, its downside is that sometimes people complain that the gray-brown ball and its branches do not become fully green or open up in water totally, which does not look very attractive. But even though you may not like how it looks, your kids might enjoy it as a science project.

Why is it important to know how these plants survive drought and come back to life?

The world’s need for water is likely to become one of the most critical resource issues of this century. The International Water Management Institute predicts that by the year 2025, one-third of the world’s population will reside in regions that experience severe water scarcity (www.iwmi.org) (Bartels and Salamini 2001, 1346–1353). Drought is a factor that dramatically threatens the world’s food supply. Therefore, plant scientists have been interested in using resurrection plants as model organisms to find out noble cellular mechanisms for improving the drought tolerance of important crop plants. Research on the molecular genetic mechanisms, metabolic and antioxidant systems as well as macromolecular and structural stabilizing processes in resurrection plants have been carried out (Moore et al 2009, 110–7). One study of Craterostigma wilmsii demonstrates that it relies almost entirely on protection during natural drying; however, it also induces a repair mechanism during rehydration that enables recovery from rapid drying. Thus, it apparently has the ability to repair if protection is inadequate and damage is incurred (Cooper 2002, 1805–13). In addition to repair mechanisms of resurrection plants, the processes that involve regulation of gene and protein activity that allow these plants to use energy storage efficiently have been investigated. The resurrection capability appears to be associated with the accumulation of a carbohydrate in the tissues as they dry. In a majority of cases, sucrose is the major carbohydrate that accumulates (Norwood et al. 2000, 159–65). In addition, an unusual disaccharide named trehalose, which is the main blood sugar in insects and serves as a major energy storage molecule enabling flight, is found in high levels in resurrection plants. This is unusual, because normally there is not much trehalose in plants. It has been proposed that trehalose serves as an osmoprotectant (Avonce et al 2005, 276–279). Osmoprotectants are small molecules that help organisms to survive when a rapid change in the movement of water across their cell membrane occurs. Peter Scott of the Annuals of Botany wrote a summary of the ability of resurrection plant Craterostigma plantagineum to survive dehydration and revive (Scott 2000, 159–166). According to his botanical briefing the roots, being in the soil, are most likely to sense the decrease in water availability first. Abscisic Acid (ABA), a plant hormone, is synthesized and released by roots as a response to drought stress. Once released, ABA could activate batteries of genes required for metabolic processes such as the accumulation of sucrose from either stored carbohydrates or through an alteration in photosynthetic carbon partitioning. In addition, the synthesis of other proteins such as dehydrins and Late Embryogenesis Abundant proteins (LEAs) could help to stabilize the plant cells as they lose water. Thus as the tissues dehydrate, leaves shrink, chlorophyll is degraded, sucrose accumulates and ultimately the xylem, which is one of the transport tissues in plants, fills with air and the plants become desiccated. On addition of water, the xylem refills with water and cells begin to take up water and expand, enzymes present in the tissues are activated, sucrose is metabolized, and chlorophyll is resynthesized. Within 24 hours the plant is restored, and is reproductively active within two weeks.

Based on these findings, it is of particular significance to understand the cellular and molecular mechanisms of resurrection plants and focus on biological engineering strategies for improving plant drought tolerance in important crop species such as cotton, soybeans, peanuts, corn, and potatoes. But these plants do not merely represent a unique model for scientists to understand a plant’s ability to cope with drought; they also serve us to deepen our faith for the Day of Judgment and rationalize it in our minds. The astonishing changes in the tissue of resurrection plants, and how they are brought back to life when they appear to be completely dead, remind us of Qur’anic verses such as the one below regarding the resurrection of decayed flesh and bones (36:78–79).

“And he puts forth for Us a parable, and forgets his own creation. He says: ‘Who will give life to these bones when they have rotted away and became dust?’ Say: ‘He will give life to them Who created them for the first time! And He is the All-Knower of every creation!’”

Time-lapse videos of resurrection plants in action, like Xerophyta and Jericho rose, are available on the web. Enjoy!

References

• Moore JP, Nguema-Ona E, Chevalier L, Lindsey GG, Brandt WF, Lerouge P, Farrant JM, Driouich A. 2006. Response of the leaf cell wall to desiccation in the resurrection plant Myrothamnus flabellifolius. Plant Physiol. 141:651–62.
• Bartels D. 2005. Desiccation Tolerance Studied in the Resurrection Plant Craterostigma plantagineum. Integr. Comp. Biol. 45: 696–701
• Xu D, Su P, Zhang R, Li H, Zhao L, Wang G. 2010. Photosynthetic parameters and carbon reserves of a resurrection plant Reaumuria soongorica during dehydration and rehydration. Plant Growth Reg. 60: 183–190.
• http://faculty.ucc.edu/biology-ombrello/pow/resurrection_plant.htm
• Bartels D, Salamini F. 2001. Desiccation tolerance in the resurrection plant Craterostigma plantagineum. A contribution to the study of drought tolerance at the molecular level. Plant Physiol. 127:1346–1353.
• Moore JP, Le NT, Brandt WF, Driouich A, Farrant JM. 2009 Towards a systems-based understanding of plant desiccation tolerance. Trends Plant Sci. 14:110–7.
• Cooper K, Farrant JM. 2002. Recovery of the resurrection plant Craterostigma wilmsii from desiccation: protection versus repair. J Exp Bot. 53:1805–13.
• Norwood M, Truesdale MR, Richter A, Scott P. 2000. Photosynthetic carbohydrate metabolism in the resurrection plant Craterostigma plantagineum. J Exp Bot. 51:159–65.
• Avonce N, Leyman B, Thevelein J, Iturriaga G. 2005. Trehalose metabolism and glucose sensing in plants. Biochem Soc Trans. 33:276–279.
• Scott P. 2000. Resurrection Plants and the Secrets of Eternal Leaf Annals of Botany. 85: 159–166.

Harold stayed at a good hotel near the beach. He woke up very early on the first morning and decided to go out for a walk along the beach before breakfast. Out on the beach, he watched the beautiful sunrise out to sea. As he walked on, he noticed many starfish on the beach – they must have been carried there by the tide the previous night and had got stranded. He felt sorry for them because they could not survive long out of the water. Thinking that there was nothing he could do about the plight of the starfish, he went on with his walk.

Then, the professor saw a young man in the distance. He too was walking along the beach but, every now and then, the young man seemed to stop walking and go through a series of odd movements. Perhaps he is doing some sort of morning exercise, Harold thought. Curious, he walked towards the young man and noted that his movements consisted of bending down, straightening up and flinging his arm out toward the sea. Now, the professor was of the opinion that the young man was engaged in a ritual that entailed picking up something from the beach and throwing it into the sea. From his clothes the young man seemed to be from the rural areas, he definitely was not a city dweller.

Harold approached the young man and asked him what he was doing.

‘I am throwing starfish into the sea,’ was the simple reply. ‘As you know, they can’t survive for very long out of the sea.’

‘But there are hundreds of them all along the shore,’ said the professor. ‘And throwing them one by one doesn’t really achieve anything. Do you think it makes any difference?’

The young man bent down and picked up another starfish. He threw it into the sea, looked at the professor and said: ‘It made a difference to that starfish.’

Harold was touched and impressed. He felt rather ashamed that, for all his learning and academic achievement, he was not as conscious of responsibility to the environment – as this simple young man was.

So he too bent down, picked up a starfish and tossed it back into the sea. Every morning for the rest of his holiday, the professor joined the young man on the beach. And together they threw starfish into the sea, trying to make as much difference as they could.