Roles of rootstocks and scions in aluminum-tolerance of Citrus

被引：0
作者：
Xin-Yan Liao
Lin-Tong Yang
Yi-Bin Lu
Xin Ye
Li-Song Chen
机构：
[1] Fujian Agriculture and Forestry University,College of Resource and Environmental Science
[2] Fujian Agriculture and Forestry University,Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology
[3] Fujian Agriculture and Forestry University,The Higher Educational Key Laboratory of Fujian Province for Soil Ecosystem Health and Regulation
来源：
Acta Physiologiae Plantarum | 2015年 / 37卷
关键词：
Aluminum; Organic acid; OJIP transient; Photosynthesis; Rootstock; Scion;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Four scion-rootstock combination [i.e., X/X and X/SP, ‘Xuegan’ (Citrus sinensis) grafted on ‘Xugan’ and ‘Sour pummelo’ (Citrus grandis), respectively, and SP/X and SP/SP, ‘Sour pummelo’ grafted on ‘Xuegan’ and ‘Sour pummelo’, respectively] plants were treated for 18 weeks with 0 (−Al) or 1.2 mM AlCl3·6H2O (+Al). Thereafter, leaf, stem and root concentrations of phosphorus and aluminum (Al), leaf and root levels of organic acids (OAs), Al-induced release of OA anions (i.e., malate and citrate), photosynthesis and chlorophyll a fluorescence (OJIP) transients were measured. Al-induced decrease of photosynthesis and damage of photosynthetic electron transport chain were less pronounced in X/X and X/SP leaves than in SP/SP and SP/X leaves, which might be related with the higher Al-induced root efflux of OA anions and leaf P concentration. C. sinensis rootstock alleviated the influences of Al-toxicity on leaf photosynthetic electron transport chain by enhancing Al-induced release of root OA anions, hence lessening Al-induced photosynthesis inhibition in SP/X plants, while the reverse was the case for C. grandis rootstock in X/SP plants. In conclusion, the tolerance of grafted Citrus plants to Al depends on the scion as well as rootstock genotype, and the scion-rootstock interaction.
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