水分胁迫对葡萄中碳标记光合产物分配的影响。

Effect of water stress on partitioning of C-labelled photosynthates in Vitis vinifera.

作者信息

Bota Josefina, Stasyk Oleg, Flexas Jaume, Medrano Hipólito

机构信息

Departament de Biologia. Universitat de les Illes Balears. Carretera de Valldemossa Km 7.5. CP 07122. Palma de Mallorca, Spain.

Institute of Plant Physiology and Genetics. National Academy of Sciences of Ukraine. Vasylkivska Str. 31/17, 03022-Kyiv-22-Ukraine.

出版信息

Funct Plant Biol. 2004 Aug;31(7):697-708. doi: 10.1071/FP03262.

DOI:10.1071/FP03262

PMID:32688940

Abstract

The influence of fruits on export and distribution of photosynthates was studied in Vitis vinifera L. cv. Tempranillo using C labelling. Also, the influence of water stress was analysed in fruiting and fruitless plants of Tempranillo and fruiting plants of cv. Alfonso Lavallée. In fruitless plants of Tempranillo, reserve organs (trunk, roots and lower shoot) represented 80% of total plant dry matter (DM), and imported up to 90% of the total C exported from the fed leaf. Therefore, the distribution pattern of photosynthates in these plants reflected mainly the sink size. However, the presence of fruits in Tempranillo strongly stimulated C export and changed the distribution pattern of assimilates. Fruits imported up to 70-80% of the total C exported, while representing only 25% of the total plant DM. Therefore, the strength of fruits as carbon sinks was independent of sink size, and it is discussed on the basis of a water potential gradient theory.

摘要

利用碳标记研究了葡萄（Vitis vinifera L. cv. Tempranillo）果实对光合产物输出和分配的影响。此外，还分析了水分胁迫对Tempranillo结果植株和不结果植株以及阿方索·拉瓦列（cv. Alfonso Lavallée）结果植株的影响。在Tempranillo不结果植株中，贮藏器官（树干、根系和下部枝条）占植株总干物质（DM）的80%，从被标记叶片输出的总碳中，高达90%被其输入。因此，这些植株中光合产物的分配模式主要反映了库的大小。然而，Tempranillo结果植株中果实的存在强烈刺激了碳的输出，并改变了同化物的分配模式。果实输入了高达70 - 80%的输出总碳，而其仅占植株总DM的25%。因此，果实作为碳库的强度与库大小无关，并基于水势梯度理论进行了讨论。