4.7 Article

Chlorophyll concentration in leaves is an indicator of potato tuber yield in water-shortage conditions

期刊

SCIENTIA HORTICULTURAE
卷 168, 期 -, 页码 202-209

出版社

ELSEVIER
DOI: 10.1016/j.scienta.2014.01.036

关键词

Deficit irrigation; Drought; Partial root-zone drying; Solanum tuberosum; Stay-green; Senescence

向作者/读者索取更多资源

The phenotyping of secondary characters is a common practice in breeding programs aiming at finding physiological mechanism related to drought tolerance. However, the dynamics of these characters depend on crop phenology, levels of water shortage, and other factors that affect their relationship with yield and limit their capacity to be used for predictive purposes. In this work, we compared tuber yield with the temporal trend (using accumulated thermal time) of chlorophyll concentration (ChIspAD), osmotic potential, and relative water content under water restriction. UNICA, a potato variety characterized by its low drought susceptibility was tested under full irrigation (as a control) and different treatments of partial root-zone drying and deficit irrigation in greenhouse and field conditions. ChIspAD was the only trait showing a concurrent changing trend (slope) with yields, particularly in field conditions. The rate of greenness loss or senescence was slower in the higher water restriction treatments, which indicates that the stay-green effect (delayed senescence) occurs in some potato varieties. ChIspAD at the loss of half the maximum plant cover during senescence (between 1040 and 1170 C days) was high and negatively correlated with final yield in all irrigation treatments. Our findings suggest that during senescence, chlorophyll increment is not related to a rise of carbon assimilation (non-functional stay-green), but could be associated with an oxidative stress occurrence, ultimately reducing yield. (C) 2014 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据