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首页> 外文期刊>Acta Horticulturae >The expression of MdACOi: impact on 'Golden Delicious' apple fruitlet abscission development
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The expression of MdACOi: impact on 'Golden Delicious' apple fruitlet abscission development

机译：MdACOi的表达：对“金冠”苹果小果脱落发育的影响

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摘要

The expression of the ethylene-related genes MdACOl, MdACS5A and MdACS5B were followed in the fruit cortex (FC) and abscission zone (AZ) tissue of king and lateral fruitlets of the 'Golden Delicious' apple [Malus x domestica Borkh.) at 0, 1, 4 and 7 daysafter treatment (DAT) with 15 mg L1 naphthaleneacetic acid (NAA), 150 mg L1 6-benzyladenine (BA), 500 mg L1 ethephon, and 3days of 96% shading, all applied at a mean 10-mm fruitlet diameter. MdACOl was the most abundant expressed gene and a positive relation was found between the amounts of transcript in FC tissue and actual abscission. Higher MdACOl expression in FC accelerate abscission process of KF and LF. In the FC tissue of KF, ethephon treatment significantly increased the expression of MdACOl 4DAT and at the same time a strong abscission of ethephon-treated KF was determined at 10 DAT. In the case of LF, ethephon and shading treatment significantly increased MdACOl expression 4 DAT and consequently the abscission by these two treatments started 8 DAT while the fruitlets of the control, NAA and BA treatments started to abscise 3 days later. LF were more subjected to abscission compared to KF and started to abscise at least 3-days earlier than KF.
机译：乙烯相关基因MdACO1，MdACS5A和MdACS5B在0时在“金冠”苹果[Malus x domestica Borkh。]的国王和侧面小果的果皮（FC）和脱落区（AZ）组织中表达。 ，在用15 mg L1萘乙酸（NAA），150 mg L1 6-苄基腺嘌呤（BA），500 mg L1乙烯利和3天96％阴影处理后（DAT），1、4和7天，均以平均10-毫米小果直径。 MdACO1是表达最丰富的基因，并且在FC组织中的转录物量与实际脱落之间发现正相关。 FC中较高的MdACO1表达加速了KF和LF的脱落过程。在KF的FC组织中，乙烯利处理显着增加了MdACO1 4DAT的表达，与此同时，在10 DAT时，经乙烯利处理的KF强烈脱落。在LF的情况下，乙烯利和遮光处理显着增加了4 DAT的MdACO1表达，因此，这两种处理的脱落开始于8 DAT，而对照，NAA和BA处理的果实在3天后开始脱落。与KF相比，LF更加容易脱落，并且比KF早至少3天开始脱落。

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