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Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

Regulation of Transpiration by Stomata

Regulation of Transpiration by Stomata

During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.

Responses to Salt Stress

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.

Tonicity in Plants

Tonicity in Plants

Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity delimits the magnitude and direction of osmosis and results in three possible scenarios that alter the volume of a cell: hypertonicity, hypotonicity, and isotonicity. Due to differences in structure and physiology, tonicity of plant cells is different from that of animal cells in some scenarios.

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Related Experiment Video

Updated: Aug 16, 2025

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM

Published on: December 31, 2012

Earlier leaf senescence dates are constrained by soil moisture.

Xiaoyue Wang^1,2, Chaoyang Wu^1,2, Ying Liu³

¹The Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.

Global Change Biology

|December 21, 2022

Summary

Soil moisture significantly impacts autumn leaf senescence dates (LSD) across the Northern Hemisphere, more than temperature or precipitation. A new model incorporating soil moisture improves predictions of vegetation phenology changes.

Keywords:

autumn phenology climate warming leaf senescence date soil moisture

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Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves

Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves

Published on: December 2, 2016

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Last Updated: Aug 16, 2025

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM

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Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections

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Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves

Kinematic Analysis of Cell Division and Expansion: Quantifying the Cellular Basis of Growth and Sampling Developmental Zones in Zea mays Leaves

Published on: December 2, 2016

Area of Science:

Ecology
Climate Science
Plant Phenology

Background:

Recent decades show unprecedented warming causing later autumn leaf senescence dates (LSD) in the Northern Hemisphere.
Significant uncertainties remain regarding the influence of soil moisture on these delaying trends.

Purpose of the Study:

To quantify the impact of soil moisture changes on autumn LSD.
To develop and validate a new model for predicting LSD that incorporates soil moisture.

Main Methods:

Developed a novel soil-moisture-constrained cooling degree days (CDD_SM) model.
Compared CDD_SM model performance against CDD, Delpierre, and spring-influenced autumn models.
Utilized observational data from 1982-2015 and future climate scenarios (SSP126, SSP585).

Main Results:

Soil moisture changes substantially impacted autumn LSD in one-fifth of vegetated areas (>30° N) from 1982-2015.
The CDD_SM model demonstrated superior performance in LSD modeling, especially in arid/semi-arid regions.
Future projections indicate earlier LSD under both SSP126 and SSP585 scenarios compared to other models.

Conclusions:

Soil moisture is a critical factor regulating autumn LSD and vegetation phenology.
The CDD_SM model improves simulations of vegetation phenology responses to climate change.
Accurate LSD modeling requires integrating soil moisture dynamics.