亚热带植物科学2016，Vol.45Issue(3)：201-206,6.DOI:10.3969/j.issn.1009-7791.2016.03.001
‘砂糖橘’缺镁早期诊断指标探索
Exploration of Early Diagnostic Indexes of Magnesium Deficiency in the Leaves of Citrus reticulata ‘Shatangju’
摘要
Abstract
In this study, the 2-year-old seedlings of Citrus reticulata ‘Shatangju’ grafted on Poncirus trifoliata were used as experimental materials with two treatments: the magnesium-deficiency treatment and the control. The contents of magnesium, chlorophyll, sucrose, starch, abscisic acid and the activities of sucrose phosphate synthase, acid invertase, pyruvate kinase of ‘Shatangju’ leaves were measured to find some indexes predicting whether the plant be lack of magnesium in advance. The results were as follows: comparing with the control, the content of leaf magnesium was significantly lower at 112 d, but there was no significant difference in cholorophyll; the content of sucrose temporarily increased at 28 d after lacking magnesium, and then restored to the control level. Besides, ABA content significantly increased at 56 d and 70 d, but not at other sampling time. The content of starch in the leaves short of was not significantly different from the control throughout the entire experiment, so was the activity of pyruvate kinase. And the activities of sucrose phosphate synthase and acid invertase declined significantly at 14 d, and the latter responded sensitively to magnesium deficiency all the time. So it was preliminarily concluded that the activity of acid invertase in ‘shatangju’ leaves could be used as an instant response index for magnesium deficiency, meanwhile the activity of sucrose phosphate synthase and contents of sucrose and ABA could be used as supplementary indexes.关键词
‘砂糖橘’/缺镁/诊断指标/酸性转化酶Key words
Citrus reticulata ‘Shatangju’/magnesium deficiency/diagnostic indexes/acid invertase分类
农业科技引用本文复制引用
陈伟立,李娟,陈杰忠,姚青..‘砂糖橘’缺镁早期诊断指标探索[J].亚热带植物科学,2016,45(3):201-206,6.基金项目
广东省农业科技项目(粤农函[2010]1216号)；柑橘镁营养状况和缺素纠正技术研究与示范(广东省科技厅2015A020209110) （粤农函[2010]1216号）
