The morphologic traits of plants that prevent drought are part of what is known as a xeromorphic structure or organization. Some of them save water, and others use water. Thus, only a few of these traits are likely to be found in water savers, while most of them are found among water consumers. These characteristics are more common in sun-exposed leaves than in the ones that are exposed to shade and in the lower ones. Plants respond to environmental stimuli making differences in behavior, morphology, anatomy, physiology, phenology, and reproductive organs. Related to stress resistance, adaptations that are of vital importance include aspects that prevent the destruction of vital vegetative tissues as well as the extensive production and proliferation of reproductive organs. There are two mechanisms for stress avoidance in plants: Tension avoidance and stress tolerance are types of stress resistance in which plants reach thermodynamic equilibrium without being damaged by stress. Plants are equipped with a "stress tolerance" method (interacting with stress) and are able to prevent, reduce, or repair stress-induced strain. Two characteristics that enable the plant to escape drought and produce remarkable performance are (1) phenologic development speed and (2) formability in terms of developmental stages.

Water Stress

Drought Resistance

Drought Tolerance

10.1007/978-981-16-7759-5_19

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Citations (2)

Physiological Effects of Drought Stress in Plants

Arash Hemati Ebrahim Moghiseh Arian Amirifar Morteza Mofidi-Chelan Behnam Asgari Lajayer

The most common effect of the drought stress is to reduce the water potential, the turgor pressure in the growing cells, and thus the lack of turgor pressure necessary for their growth. Lack of water accelerates cell differentiation. Under drought stress, root, stem, leaf, and fruit growth decreases. Also, in these conditions, not all plant organs are affected equally. As a rule, due to drought stress, the ratio of leaves to stems decreases. Older leaves and leaves that are exposed to shade usually die sooner, slow down tillering, and increase tiller death in tillering species. Physiologic effects of water stress contain so many cases such as reduction of relative water content (RWC), reduction of intercellular space during wilting, effect of drought stress on photosynthesis, effect of drought stress on respiration, effect of drought stress on photosynthetic derivative distribution, effect of drought stress on metabolism, accumulation of sugars, drought stress and protein breakdown, and the effect of drought stress on ABA hormone, which are among the most important of these cases.

Turgor pressure

Wilting

Drought stress

Tiller (botany)

10.1007/978-981-16-7759-5_6

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Impact of Various Environmental Factors on the Biosynthesis of Alkaloids in Medicinal Plants

Environmental challenges and solutions (2022)

Arian Amirifar Arash Hemati Behnam Asgari Lajayer Janhvi Pandey Tess Astatkie

10.1007/978-3-030-92050-0_9

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Citations (5)