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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.

Water and Mineral Acquisition

Water and Mineral Acquisition

Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.

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.

Tonicity in Plants

Tonicity in Plants

Plant cells maintain appropriate osmotic balance in extreme conditions. For instance, plants in dry environments store water in vacuoles, limit the opening of their stoma, and have thick, waxy cuticles to prevent unnecessary water loss. Some species of plants that live in salty environments store salt in their roots. As a result, water osmosis occurs in the root from the surrounding soil.
Tonicity
Tonicity describes the capacity of a cell to lose or gain water depending on the solute...

Adaptations that Reduce Water Loss

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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.

Xylem and Transpiration-driven Transport of Resources

Xylem and Transpiration-driven Transport of Resources

The xylem of vascular plants distributes water and dissolved minerals that are taken up by the roots to the rest of the plant. The cells that transport xylem sap are dead upon maturity, and the movement of xylem sap is a passive process.

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Related Experiment Video

Updated: May 3, 2026

A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions

A Telemetric, Gravimetric Platform for Real-Time Physiological Phenotyping of Plant–Environment Interactions

Published on: August 5, 2020

Plant water uptake in drying soils.

Guillaume Lobet¹, Valentin Couvreur, Félicien Meunier

¹PhytoSYSTEMS, Université de Liège, 4000 Liège, Belgium.

Plant Physiology

|February 12, 2014

Summary

Understanding root water uptake in drying soils is crucial for agriculture. Research integrates soil and root properties to improve crop water acquisition, especially in challenging environments.

Area of Science:

Plant physiology
Soil science
Agricultural science

Background:

Root water uptake research increasingly integrates soil and root properties.
This aligns with agricultural focus on suboptimal crop production environments.

Purpose of the Study:

To enhance understanding of water acquisition from drying soils.
To explore how root system architecture and hydraulic properties influence water uptake.

Main Methods:

Review of recent investigations on root water uptake.
Analysis of modeling studies on soil-plant system interactions.

Main Results:

Root system architectures can facilitate deep-water extraction or water conservation.

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RGB and Spectral Root Imaging for Plant Phenotyping and Physiological Research: Experimental Setup and Imaging Protocols

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Manipulation of root hydraulic properties offers potential for improved water uptake.

Soil hydraulics play a critical role in controlling water uptake in drying soils.

Conclusions:

Integrative soil-plant system approaches are essential for understanding water uptake in drying soils.
Further research should focus on combined soil and root property analysis for agricultural applications.