TY - JOUR
T1 - Influence of Boron Nutrition on Membrane Leakage, Chlorophyll Content and Gas Exchange Characteristics in Cotton (Gossypium Hirsutum L.)
AU - Ahmed, N.
AU - Abid, M.
AU - Rashid, A.
AU - Abou-Shanab, R.
AU - Ahmad, F.
N1 - Funding Information:
Financial support for the study was provided by Higher Education Commission of Pakistan.
PY - 2014/12
Y1 - 2014/12
N2 - Understanding the effect of boron (B) on plant physiology will help to refine the diagnosis of B deficiency and improvement in B fertilizer recommendations for cotton (Gossypium hirsutum L.) growing areas. This study shows the testing of hypotheses "that application of B-fertilizer improves net photosynthetic rate (PN) and water use efficiency (WUE) for cotton plant on a B-deficient soil [< 0.50 mg B kg-1 hydrochloric acid (HCl)-extractable] in an arid environment". Thus, a permanent layout [two-year field experiment (2004 and 2005)] was conducted to study the impact of B fertilizer at 0, 1.0, 1.5, 2.0, 2.5, and 3.0 kg ha-1 on gas exchange and electrolyte leakage (EL) characteristics of cotton crop (cv. 'CIM-473'). The soil at experimental site was alkaline (pH 8.1), calcareous [calcium carbonate (CaCO3 5.6%)], and silt loam (Typic Haplocambid). Boron use decreased EL of plant membrane (P ≤ 0.05), and increased PN, transpiration rate (E) and stomatal conductance (gs), while intercellular concentration of carbon dioxide (CO2; Ci) significantly decreased (P ≤ 0.05) during both experimental years. There was a positive, but non-significant effect of B concentration on chlorophyll content in plant leaves. Application of 3.0 kg B ha-1 improved WUE up to 9.7% [4.62 μmol (CO2) mmol-1 water (H2O)] compared to control plants (4.21 [μmol (CO2) mmol-1 (H2O)]. Principal component analysis (PCA) of data indicates positive correlations between leaf B concentration and PN, E, gs, and WUE, while a negative relationship existed between leaf B concentration and intercellular CO2 (Ci). This study showed that addition of B fertilizer in the B-deficient calcareous soil proved beneficial for growth and development for cotton crop by enhancing its WUE and gas exchange characteristics.
AB - Understanding the effect of boron (B) on plant physiology will help to refine the diagnosis of B deficiency and improvement in B fertilizer recommendations for cotton (Gossypium hirsutum L.) growing areas. This study shows the testing of hypotheses "that application of B-fertilizer improves net photosynthetic rate (PN) and water use efficiency (WUE) for cotton plant on a B-deficient soil [< 0.50 mg B kg-1 hydrochloric acid (HCl)-extractable] in an arid environment". Thus, a permanent layout [two-year field experiment (2004 and 2005)] was conducted to study the impact of B fertilizer at 0, 1.0, 1.5, 2.0, 2.5, and 3.0 kg ha-1 on gas exchange and electrolyte leakage (EL) characteristics of cotton crop (cv. 'CIM-473'). The soil at experimental site was alkaline (pH 8.1), calcareous [calcium carbonate (CaCO3 5.6%)], and silt loam (Typic Haplocambid). Boron use decreased EL of plant membrane (P ≤ 0.05), and increased PN, transpiration rate (E) and stomatal conductance (gs), while intercellular concentration of carbon dioxide (CO2; Ci) significantly decreased (P ≤ 0.05) during both experimental years. There was a positive, but non-significant effect of B concentration on chlorophyll content in plant leaves. Application of 3.0 kg B ha-1 improved WUE up to 9.7% [4.62 μmol (CO2) mmol-1 water (H2O)] compared to control plants (4.21 [μmol (CO2) mmol-1 (H2O)]. Principal component analysis (PCA) of data indicates positive correlations between leaf B concentration and PN, E, gs, and WUE, while a negative relationship existed between leaf B concentration and intercellular CO2 (Ci). This study showed that addition of B fertilizer in the B-deficient calcareous soil proved beneficial for growth and development for cotton crop by enhancing its WUE and gas exchange characteristics.
KW - Gossypium hirsutum L.
KW - boron nutrition
KW - calcareous soil
KW - electrolyte leakage
KW - photosynthetic rate
KW - water use efficiency
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U2 - 10.1080/01904167.2014.912325
DO - 10.1080/01904167.2014.912325
M3 - Article
AN - SCOPUS:84906776143
SN - 0190-4167
VL - 37
SP - 2302
EP - 2315
JO - Journal of Plant Nutrition
JF - Journal of Plant Nutrition
IS - 14
ER -