Yield, transpiration and growth of tomatoes under combined excess boron and salinity stress

被引:102
作者
Ben-Gal, A
Shani, U
机构
[1] Hebrew Univ Jerusalem, Fac Agr Food & Environm Sci, Dept Soil & Water Sci, IL-76100 Rehovot, Israel
[2] Arava Res & Dev, Arava Expt Stn, IL-88820 Mobile Post Eilot, Israel
关键词
boron; combined stress; Lycopersicon esculentum; salinity; tomato; toxicity; yield response;
D O I
10.1023/A:1021556808595
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Boron is essential to growth at low concentrations and limits growth and yield when in excess. Little is known regarding plant response to excess boron (B) and salinity occurring simultaneously. The influences of B and salinity on tomatoes (Lycopersicon esculentum Mill. Cv '5656') were investigated in lysimeters. Salinity levels were 1, 3, 6 and 9 dSm(-1) and B levels were 0.028, 0.185, 0.37, 0.74, 1.11, 1.48 mol m(-3). Excess boron was found to decrease yield and transpiration of tomatoes. This effect was inhibited when plants were exposed to simultaneous B and salinity stresses. Both irrigation water salinity and boron concentration influenced water use of the plants in the same manner as they influenced yield. While yield was found to decrease with increased boron concentration in leaf tissue, increased salinity led to decreased boron accumulation. Yield response was found to correlate better to B concentration in irrigation water and soil solution than to plant tissue B content. A dominant-stress-factor model was assumed and validated. The model applies the principle that when a plant is submitted to conditions of stress caused by B in conjunction with salinity, the more severe stress determines yield. The results of this study have significance in modeling and management of high salinity high boron conditions. Under saline conditions, differences in crop yield and in water use may not be experienced over a significant range of boron concentrations.
引用
收藏
页码:211 / 221
页数:11
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