Improved Salinity Tolerance by Phosphorus Fertilizer in Two Phaseolus vulgaris Recombinant Inbred Lines Contrasting in Their P-Efficiency

被引:81
作者
Bargaz, A. [1 ]
Nassar, R. M. A. [2 ]
Rady, M. M. [3 ]
Gaballah, M. S. [4 ]
Thompson, S. M. [5 ]
Brestic, M. [6 ]
Schmidhalter, U. [7 ]
Abdelhamid, M. T. [8 ]
机构
[1] Swedish Univ Agr Sci, Dept Biosyst & Technol, Alnarp, Sweden
[2] Cairo Univ, Fac Agr, Dept Agr Bot, Giza, Egypt
[3] Fayoum Univ, Fac Agr, Dept Bot, Al Fayyum, Egypt
[4] Natl Res Ctr, Water Relat & Field Irrigat Dept, Giza, Egypt
[5] Texas A&M Univ, Dept Hort Sci, College Stn, TX 77843 USA
[6] Slovak Univ Agr, Dept Plant Physiol, Nitra, Slovakia
[7] Tech Univ Munich, Dept Plant Sci, Freising Weihenstephan, Germany
[8] Natl Res Ctr, Dept Bot, 33 EL Bohouth St, Giza 12622, Egypt
关键词
common bean; Phaseolus vulgaris; phosphorus efficiency; salt stress; VICIA-FABA; SALT-TOLERANCE; EXOGENOUS APPLICATION; ANTIOXIDANT ENZYMES; ALPHA-TOCOPHEROL; GROWTH; PLANTS; ACCUMULATION; ACQUISITION; PROLINE;
D O I
10.1111/jac.12181
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Legumes' sensitivity to salt is exacerbated under growth conditions requiring nitrogen fixation by the plant. Phosphorus (P) deficiency is widespread in legumes, especially common bean (Phaseolus vulgaris L). To examine the performance of P. vulgaris under salt stress conditions, a field experiment was conducted using two recombinants inbred lines (RILs) 115 (P-deficiency tolerant) and 147 (P-deficiency susceptible), grown under different salinity levels (L) (1.56, 4.78, and 8.83 dS m(-1) as LI, L2, and L3, respectively) and supplied with four P rates (0, 30, 60, and 90 kg ha(-1) P as P0, P30, P60, and P90, respectively) in order to assess the impact of P on salt tolerance. Results indicate that growing both RILs at P60 or P90 under all salinity levels (especially L1) significantly increased total chlorophyll, carotenoids, total soluble sugars, total free amino acids, and proline. Increasing P supply up to P60 under all salinity levels significantly induced higher accumulation of P, K+, Ca2+ and Mg2+ leaves in both RILs. Based on quadratic response over all locations, the maximum seed yield of 1.465 t ha(-1) could be obtained at application of P 81.0 kg ha-1 in RIL115, while seed yield of 1.275 t ha(-1) could be obtained with P rate of 78.3 kg ha(-1) in RIL147. RIL115 exhibited more salt-tolerance with positive consequence on plant biomass and grain yield stability. Improved salt tolerance through adequate P fertilization is likely a promising strategy to improve P. vulgaris salinity tolerance and thus productivity, a response that seems to be P-rate dependent.
引用
收藏
页码:497 / 507
页数:11
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