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在"哈斯"梨中,替代性轴承:果子负载诱导的芽素稳态变化与开花抑制有关

Madhuri Pochamreddy^1,2, Dor Haim^1,2, Eyal Halon¹

¹Institute of Plant Sciences, Agricultural Research Organization, Volcani Center, Rishon LeZion 7505101, Israel.

Journal of experimental botany

|July 16, 2024

概括

梨树的高水果负荷会通过增加芽中的auxin (英多-3-酸,IAA) 来减少开花. 这种辅酶积累触发了花抑制剂,阻止了未来的花发育.

科学领域:

植物生理学植物生理学
园艺园艺园艺园艺
分子生物学分子生物学

背景情况:

"哈斯"梨中含有水果的存在减少了随后的开花.
假设重水果负载 (HFL) 在芽中产生辅酶 (英多尔-3-酸,IAA) 信号,抑制开花.

研究的目的:

研究梨HFL对芽IAA积累和开花过渡的影响.
阐明HFL影响"哈斯"梨开花的机制.

主要方法:

从"上"和"关闭"树的芽中量化IAA结合物.
植物调节者的基因表达分析 (PaTFL1).
使用放射性标记 [14C]IAA 的实验来评估辅酶运输.
用IAA和极性辅酶运输抑制剂 (2,3,5-triiodobenzoic acid) 的治疗.

主要成果:

在"上"树的芽中,IAA-酸盐和IAA-酸盐结合物的较高水平表明自由IAA的增加.
HFL诱导了花抑制剂PaTFL1,与花减少相关.
HFL导致IAA合成增加,并减少IAA出口,使IAA在芽中积累.
[14C]IAA的实验表明,HFL减少了射击的IAA运输.
治疗IAA和auxin运输抑制剂延迟了花朵的发育,并增加了PaTFL1的表达.

结论:

梨HFL在芽中产生IAA信号,由IAA结合介导.
这种IAA信号诱导了PaTFL1,抑制了花朵的发展并减少了开花.
了解这种机制对于管理"哈斯"梨园的开花至关重要.

关键词:

终端鲜花1 (TFL1) 在线播放备用轴承备用轴承备用轴承辅助剂辅助剂辅助剂梨 (Persea americana) 开花的开花时间果子装载的水果装载.极地辅助体的运输方式

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