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Effect of far‐red light on malate and potassium contents in cotton leaves: Relation to drought resistance
Author(s) -
Hubac Camille,
Guerrier Danièle,
Bousquet Ulrike
Publication year - 1986
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1986.tb01228.x
Subject(s) - potassium , transpiration , drought resistance , water content , chemistry , biology , osmotic shock , botany , agronomy , horticulture , photosynthesis , biochemistry , geotechnical engineering , organic chemistry , gene , engineering
Long‐ or short‐term far‐red light given before a dark treatment modified the water status and the potassium and malate contents in cotton ( Gossypium hirsutum L. cv. Bou) leaves. Upon a long‐term treatment, the leaf water content and the leaf water and osmotic potentials were lower whereas stomatal resistance was greater with a decrease in daily transpiration. There was a parallel increase in potassium and malate, but the calcium content was not significantly changed. This resulted in better water economy with an increase in drought resistance. Upon a short‐term treatment, the accumulation of potassium and malate was reversible and the drought resistance was modified accordingly. There was a positive correlation between the ability of a plant to resist water stress and the content of potassium and malate.