Water Relations of Cotton Plants under Nitrogen Deficiency
نویسندگان
چکیده
منابع مشابه
Water Relations of Cotton Plants under Nitrogen Deficiency: I. Dependence upon Leaf Structure.
Cotton plants (Gossypium hirsutum L.) grown on deficient levels of N exhibited many of the characteristics associated with drought resistance. In N-deficient plants, leaf areas and leaf epidermal cells were smaller than at the same nodes in high-N plants. N-deficient leaves lost only about half as much water per unit change in water potential as did high-N leaves. In addition, they maintained a...
متن کاملWater Relations of Cotton Plants under Nitrogen Deficiency: III. STOMATAL CONDUCTANCE, PHOTOSYNTHESIS, AND ABSCISIC ACID ACCUMULATION DURING DROUGHT.
Nitrogen nutrition exerted a strong effect on stomatal sensitivity to water stress in cotton. In well-watered plants grown with 0.31 millimolar N in the nutrient solution, stomata closed at a water potential of -9 bars even though the wilting point was below -15 bars. For each doubling of nutrient N level, the water potential for stomatal closure decreased by about 2 bars. Elevated intercellula...
متن کاملWater Relations of Cotton Plants under Nitrogen Deficiency: V. Environmental Control of Abscisic Acid Accumulation and Stomatal Sensitivity to Abscisic Acid.
Suboptimal N nutrition increased the water potential for stomatal closure in water stressed cotton (Gossypium hirsutum L.) leaves. This increased sensitivity to water stress had two components, increased accumulation of abscisic acid (ABA) and increased apparent stomatal sensitivity to ABA. Low N increased the threshold water potentials for stomatal closure and ABA accumulation by about 4 bars ...
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The objective of this investigation was to study the effects of nitrogen on tolerance to water-stress in cotton (Gossypium hirsutum L.) seedlings. Growth chamber studies with pots of washed sand were carried out in Fayetteville, USA, and Nanjing, Chinawith three water conditions (well-watered, drought-stressed, and waterlogging), and three nitrogen rates, low nitrogen (16 mM, approximately 224 ...
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The dynamic and static deficit (DDI, SDI), partial root drying (DPRD, SPRD) and full (FI)irrigation strategies were applied in Agria and Ramos potato cultivars in a semi-arid area. FIreceived 100% of the potential evapotranspiration (ET); SDI and SPRD received 75% of ETduring the growth period; DDI and DPRD received 90% of ET in the first third, 75% of ET inthe second third and 50% of ET in the...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1981
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.67.1.115