| 脐橙叶片矿质营养元素含量的分区分布特征 |
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| 引用本文： | 刘桂东,胡 萍,曾 钰,曾紫君,管 冠,姚锋先,周高峰.脐橙叶片矿质营养元素含量的分区分布特征[J].园艺学报,2019,46(1):47-56. |
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| 作者姓名： | 刘桂东 胡 萍 曾 钰 曾紫君 管 冠 姚锋先 周高峰 |
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| 作者单位： | （赣南师范大学生命科学学院，国家脐橙工程技术研究中心，江西赣州 341000） |
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| 摘 要： | 为揭示矿质营养元素在脐橙叶中分区分布特征,以枳砧和枳橙砧纽荷尔脐橙为对象,测定新叶和老叶的叶尖、叶缘、中部、叶基和翼叶等5个分区中10种元素(N、P、K、Ca、Mg、Fe、Mn、Cu、Zn和B)的含量,并分析各分区离子组成的差异。主成分分析显示,第一主成分(PC1)和第二主成分(PC2)分别解释了总变量的43.4%和21.1%,明确区分了新叶和老叶,大致区分了叶不同分区,发现新叶翼叶与其他分区具有明显差异,而老叶本叶各分区的离散程度明显大于新叶本叶各分区。两种砧木脐橙新叶中钾含量分布表现为翼叶叶基中部叶缘≈叶尖,镁含量表现为叶尖≈叶缘中部叶基翼叶;两种砧木脐橙老叶中锰含量表现为叶尖≈叶缘中部叶基翼叶,硼含量表现为叶尖叶缘中部叶基翼叶。N、P、B在新叶本叶各分区以及P、Ca在老叶本叶各分区间含量都没有显著差异。枳砧脐橙新叶翼叶Mn、Cu和Zn的含量与叶片其他分区没有显著差异,而枳橙砧脐橙新叶翼叶Mn、Cu和Zn的含量都分别显著低于叶片其他分区。结果表明,不同元素叶片分区分布特征存在明显差异,翼叶的元素含量和离子组成与叶片其他分区差异明显。
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| 关 键 词： | 柑橘 翼叶 大量元素 微量元素 叶片分区 |
Mineral Nutrients Distribution in Leaf Different Parts in Navel Orange Plant |
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| LIU Guidong,HU Ping,ZENG Yu,ZENG Zijun,GUAN Guan,YAO Fengxian,ZHOU Gaofeng.Mineral Nutrients Distribution in Leaf Different Parts in Navel Orange Plant[J].Acta Horticulturae Sinica,2019,46(1):47-56. |
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| Authors: | LIU Guidong HU Ping ZENG Yu ZENG Zijun GUAN Guan YAO Fengxian ZHOU Gaofeng |
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| Institution: | （National Navel Orange Engineering Research Center，College of Life Sciences，Gannan Normal University，Ganzhou，Jiangxi 341000，China） |
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| Abstract: | To explore the leaf partitioning of essential mineral elements in Newhall navel orange plants grafted on trifoliate orange and citrange，ten elements（N，P，K，Ca，Mg，Fe，Mn，Cu，Zn and B）in leaf tip，leaf margin，leaf middle，leaf base，and winged petiole of the new leaves and old leaves were determined by ICP-MS and Kjeldahl apparatus，and analyzed using multivariate analysis and principal component analysis（PCA）. The PCA results showed that the first two principal components could explain 43.4% and 21.1% of the total variables，respectively. The first component separated new leaves from old leaves，the second component generally discriminated the different leaf parts，especially the winged petiole of new leaves from other leaf parts. For the new leaves，in both rootstock，showed a steep gradient in the K concentrations（winged petiole > leaf base > leaf middle > leaf margin ≈ leaf tip）and Mg concentrations（leaf tip ≈ leaf margin > leaf middle > leaf base > winged petiole）；and the old leaves showed a steep gradient in the Mn concentrations（leaf tip ≈ leaf margin > leaf middle > leaf base > winged petiole）and B concentrations（leaf tip > leaf margin > leaf middle > leaf base > winged petiole）. There was no significant difference in the contents of N，P and B among the different leaf parts of the new leaf blade and the contents of P and Ca among the different leaf parts of the old leaf blade. The contents of Mn，Cu and Zn in the new leaf petiole wing of Newhall navel orange plants grafted on trifoliate orange were not significantly different from those of the other new leaf parts，while the contents of Mn，Cu and Zn in the new leaf petiole wing of Newhall navel orange plants grafted on citrange were significantly lower than those of the other new leaf parts. These results suggest that there are obvious differences in the element distribution characteristics of leaf partitioning，and the element concentrations and ion composition in the leaf petiole wing are very different from other leaf parts. |
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| Keywords: | citrus leaf petiole wing macro-element micro-element leaf partitioning |
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