Stable Carbon Isotope Composition (δ13C), Water Use Efficiency, and Biomass Productivity of Lycopersicon esculentum, Lycopersicon pennellii, and the F1 Hybrid
Stable Carbon Isotope Composition (δ13C), Water Use Efficiency, and Biomass Productivity of Lycopersicon esculentum, Lycopersicon pennellii, and the F1 Hybrid
复制标题
DOI：
10.1104/pp.88.1.213
复制
发表时间：
1988-09
期刊：
影响因子：
7.4
通讯作者：
B. Martin;Y. Thorstenson
中科院分区：
文献类型：
--
作者：
B. Martin;Y. Thorstenson
三个西红柿，番茄。cv UC 82 B、耐旱野生近缘种Lycopersicon pennellii（Cor.）D9 Arcy和它们的F1杂种在保持三种土壤湿度水平的容器中生长。季节性的用水量是通过对每个容器的季节性每日重量损失进行土壤蒸发校正而得出的。通过收获和称重整个干燥植物来测定植物生物量。整个季节的水分利用效率（克干重/千克H2O）通过干生物量除以整个季节的水分利用来计算。整个季节的水分利用效率是最大的野生亲本，最穷的国内父母，和中间（但更接近野生亲本）的F1杂种。瞬时水分利用效率（微摩尔CO2/毫摩尔H2 O）确定的气体交换测量个别叶片与季节性的水分利用效率相关性很差。然而，叶组织样品的稳定碳同位素的相对丰度与整个季节的水分利用效率密切相关。此外，同位素组成和每个基因型单独的季节长的水分利用效率与植物干重呈强烈的负相关时，干重变化作为土壤水分的函数。
Three tomatoes, Lycopersicon esculentum Mill. cv UC82B, a droughttolerant wild related species, Lycopersicon pennellii (Cor.) D9Arcy, and their F 1 hybrid, were grown in containers maintained at three levels of soil moisture. Season-long water use was obtained by summing over the season daily weight losses of each container corrected for soil evaporation. Plant biomass was determined by harvesting and weighing entire dried plants. Season-long water use efficiency (gram dry weight/kilogram H 2 O) was calculated by dividing the dry biomass by the season-long water use. The season-long water use efficiency was greatest in the wild parent, poorest in the domestic parent, and intermediate (but closer to the wild parent) in the F 1 hybrid. Instantaneous water-use efficiency (micromole CO 2 /millimole H 2 O) determined by gas exchange measurements on individual leaves was poorly correlated with season-long water use efficiency. However, the relative abundance of stable carbon isotopes of leaf tissue samples was strongly correlated with the season-long water use efficiency. Also, the isotopic composition and the season-long water use efficiency of each genotype alone were strongly negatively correlated with plant dry weight when the dry weight varied as a function of soil moisture.