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Acta Agron Sin ›› 2009, Vol. 35 ›› Issue (3): 381-387.doi: 10.3724/SP.J.1006.2009.00381

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Advances in Molecular Biology Study of Plant Organ Abscission

WANG Xiang;CHEN Xiao-Bo**;LI Ai-Li;MAO Long*   

  1. Institute of Crop Sciences,Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081,China
  • Received:2008-08-11 Revised:2008-10-24 Online:2009-03-12 Published:2009-01-15
  • Contact: MAO Long

Abstract:

Organ abscission is a ubiquitous phenomenon in the plant kingdom. Abscission occurs at specific sites called abscission zones (AZs). The development and functionating of AZs are complex and precise processes which involve many genes. Degradation of cell wall and middle lamella at AZs causes cell separation and leads to shedding of distal organs. Seed-shattering is one of the most important traits in crop cultivation and breeding and is a typical case of organ shedding. Domestication of non-shattering crop lines is one of the greatest achievements of human civilization, but untill recently its molecular mechanisms started to be revealed. This review focuses on the advances in the molecular biology study of abscission zone development and organ shedding in Arabidopsis, rice and tomato. The paper provides a brief perspective for the future research in this important arena.

Key words: Abscission zone, Organ abscission, Seed-shattering

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