Phosphorus nutrition and tolerance of cotton to water stress: I. Seed cotton yield and leaf morphology

Singh, Vijaya, Pallaghy, Charles K. and Singh, Dhananjay (2006) Phosphorus nutrition and tolerance of cotton to water stress: I. Seed cotton yield and leaf morphology. Field Crops Research, 96 2-3: 191-198. doi:10.1016/j.fcr.2005.06.009


Author Singh, Vijaya
Pallaghy, Charles K.
Singh, Dhananjay
Title Phosphorus nutrition and tolerance of cotton to water stress: I. Seed cotton yield and leaf morphology
Journal name Field Crops Research   Check publisher's open access policy
ISSN 0378-4290
Publication date 2006-04-30
Sub-type Article (original research)
DOI 10.1016/j.fcr.2005.06.009
Volume 96
Issue 2-3
Start page 191
End page 198
Total pages 8
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Language eng
Subject 0703 Crop and Pasture Production
070303 Crop and Pasture Biochemistry and Physiology
070306 Crop and Pasture Nutrition
Abstract Seed cotton yield and morphological changes in leaf growth were examined under drying soil with different phosphorus (P) concentrations in a tropical climate. Frequent soil drying is likely to induce a decrease in nutrients particularly P due to reduced diffusion and poor uptake, in addition to restrictions in available water, with strong interactive effects on plant growth and functioning. Increased soil P in field and in-ground soil core studies increased the seed cotton yield and related morphological growth parameters in a drying soil, with hot (daily maximum temperature >33 °C) and dry conditions (relative humidity, 25% to 35%), particularly during peak boll formation and filling stage. The soil water content in the effective rooting zone (top 0.4 m) decreased to −1.5 MPa by day 5 of the soil drying cycle. However, the increased seed cotton yield for the high-P plants was closely related to increasing leaf area with increased P supply. Plant height, leaf fresh mass and leaf area per plant were positively related to the leaf P%, which increased with increasing P supply. Low P plants were lower in plant height, leaf area, and leaf tissue water in the drying soil. Individual leaf area and the water content of the fresh leaf (ratio of dry mass to fresh mass) were significantly dependent on leaf P%.
Keyword Cotton
Phosphorus
Water stress
Leaf expansion
Leaf water
Cell turgor
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
 
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