Mechanisms of self-incompatible and compatible pollen responses in the brassica family

芸苔科自交不亲和和亲和花粉反应机制

• 批准号: 138558-2011
• 负责人: Goring, Daphne
• 金额: $ 4.08万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=522441
• 关键词: Mechanisms; self; incompatible; compatible; pollen

In flowering plants, fertilization and seed development rely on successful interactions between the pollen (male) and the pistil (female). Plants cannot control pollination (the process of pollen landing on the pistil) and need the ability to recognize which pollen should be accepted for fertilization. The Goring research group studies pollen recognition systems in the crucifer plants to determine how these plants are able to select the most appropriate pollen grains for fertilization. In this family, initial pollen recognition by the pistil occurs shortly after pollen grains land on the top of the pistil. Foreign pollen grains are largely ignored; while resources are provided by the pistil to related compatible pollen grains for hydration, and pollen tube growth through the top of the pistil (Compatible Pollen Response). The pollen tubes then grow down the pistil to reach ovules for fertilization. In addition, many species in the crucifer family have a system where self-pollen is rapidly recognized and rejected (Self-Incompatible Pollen Response). The main function of this latter system is to prevent inbreeding.

在开花植物中，受精和种子发育依赖于花粉（雄性）和雌性（女性）之间的成功相互作用。 植物无法控制授粉（在雌蕊上的花粉着陆的过程），并且需要识别应接受哪种花粉进行施肥的能力。 Goring研究小组研究了十字架植物中的花粉识别系统，以确定这些植物如何能够选择最合适的花粉颗粒进行施肥。 在这个家庭中，雌蕊的最初花粉识别发生后不久，花粉颗粒降落在雌蕊的顶部。 外国花粉颗粒在很大程度上被忽略了；虽然雌蕊提供资源为与兼容的兼容花粉颗粒一起提供水合，并通过雌蕊顶部的花粉管生长（兼容花粉反应）。 然后，花粉管从雌蕊下生长，到达胚珠以进行施肥。此外，十字架家族中的许多物种都有一个迅速识别和拒绝的自生（自兼容花粉反应）的系统。 后一个系统的主要功能是防止近交。