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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.

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.

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.Plants and Hypotonic EnvironmentsUnlike animal cells,...

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...

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Related Experiment Video

Updated: Jun 14, 2026

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics

The Terroir Concept Interpreted through Grape Berry Metabolomics and Transcriptomics

Published on: October 5, 2016

Grapevine under deficit irrigation: hints from physiological and molecular data.

M M Chaves¹, O Zarrouk, R Francisco

¹Instituto Superior de Agronomia, Technical University of Lisbon, Tapada da Ajuda 1349-017 Lisbon, Portugal. mchaves@isa.utl.pt

Annals of Botany

|March 20, 2010

Summary

This summary is machine-generated.

Grapevine water deficit responses are key for efficient irrigation. Understanding plant signals and berry composition changes optimizes yield and quality in drought-prone regions.

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Comprehensive Workflow for the Genome-wide Identification and Expression Meta-analysis of the ATL E3 Ubiquitin Ligase Gene Family in Grapevine

Published on: December 22, 2017

Area of Science:

Viticulture and Enology
Plant Physiology
Molecular Biology

Background:

Vineyards in drought-prone regions face yield and quality challenges due to water deficits and high temperatures.
Efficient irrigation strategies, like deficit irrigation, are crucial for sustainable viticulture.
Understanding grapevine responses to water stress is vital for optimizing management and variety selection.

Purpose of the Study:

To review the physiological and molecular mechanisms of grapevine acclimatization to water scarcity.
To explore the role of chemical and hydraulic signals in plant water status regulation.
To investigate the impact of water deficits on berry development, composition, and wine quality.

Main Methods:

Review of scientific literature on plant acclimatization to water scarcity.
Analysis of short- and long-distance signaling pathways (chemical and hydraulic).
Examination of grapevine's isohydric vs. anisohydric behavior under water stress.
Assessment of water deficit effects on berry constituents (tannins, anthocyanins) and related gene/protein regulation.

Main Results:

Drying roots synthesize signals that induce stomatal closure and restrict leaf growth, enabling plants to endure soil drying.
Isohydric behavior maintains plant water potential via stomatal control, contrasting with anisohydric behavior.
Mild water deficits enhance berry skin constituents like tannins and anthocyanins, positively impacting wine quality.
Regulation of metabolic pathways by water deficit influences berry composition and wine quality.

Conclusions:

Plant acclimatization to water deficit involves complex signaling networks and physiological adjustments.
Deficit irrigation strategies can be optimized by understanding grapevine's water use behavior.
Mild water deficits can improve grape and wine quality by modulating berry composition.