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Xin-Yan Liao, Lin-Tong Yang, Yi-Bin Lu, Xin Ye, Li-Song Chen. Roles of rootstocks and scions in aluminum-tolerance of Citrus


发布者:陈毅    发布时间:2015-02-02    浏览次数:120

 

Xin-Yan Liao, Lin-Tong Yang, Yi-Bin Lu, Xin Ye, Li-Song Chen. Roles of rootstocks and scions in aluminum-tolerance of Citrus. Acta Physiologiae Plantarum. 2015, 37:1743

Abstract:

        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.

Roles of rootstocks and scions in aluminum-tolerance of Citrus.pdf

 
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