- 期刊
Sensitivity of Response to Abscisic Acid Affects the Power of self-thinning in Arabidopsis thaliana
脫落酸敏感性影響擬南芥群體(Arabidopsis thaliana)的自疏指數
摘要
本文以兩個擬南芥脫落酸突變體（abil-1，脫落酸不敏感型；eral-2，對脫落酸超敏感型）為試驗材料，研究了脫落酸敏感性對擬南芥群體的自疏指數的效應。結果顯示，abil-1的自疏指數小於野生型且eral-2的自疏指數大於野生型。資源利用的兩個參數（l根距中部葉片的平均高度；α全部葉片面積）也表明，在密度脅迫條件下eral-2對資源利用優於abil-1。葉片光資源利用的參數（光合速率，光合指數PSI），水分損失（如蒸騰速率，氣孔導度）及水分利用率的結果與上述兩個參數（1和α）相一致，這表明脫落酸敏感性通過資源利用（光和水）影響擬南芥群體的自疏指數。
並列摘要
The effect of sensitivity of abscisic acid (ABA) on the power of self-thinning was studied with two Arabidopsis mutants (abil-1, insensitive to ABA and eral-2 hypersensitive to ABA). The experimental results showed that the self-thinning power of abil-1 (-1.49) was smaller than that of wild type (-1.35), and the self-thinning power of eral-2 (-1.21) was greater than that of wild type. Two parameters of resource utilization (1 mean height from root to leaf; a total area of leaves) were more advantageous to eral-2 than to abi1-1 under density stress. Physiological indices of light use (photosynthetic rate, photosynthesis index PSI), water loss (transpiration rate, stomata area index SAI), and water-use efficiency (photosynthetic rate? transpiration rate) of abi1-1 and eral-2 were consistent with the resource utilization parameters of these Arabidopsis mutants. It can be concluded that the different self-thinning power of the two Arabidopsis mutants resulted from their different resource utilization (such as light and water use) in response to density stress.
延伸閱讀
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