中国农业科学 ›› 2014, Vol. 47 ›› Issue (9): 1774-1783.doi: 10.3864/j.issn.0578-1752.2014.09.012

• 园艺 • 上一篇    下一篇

荔枝花芽分化研究进展

 陈厚彬, 苏钻贤, 张荣, 张红娜, 丁峰, 周碧燕   

  1. 华南农业大学园艺学院,广州 510642
  • 收稿日期:2013-09-28 出版日期:2014-05-01 发布日期:2014-02-21
  • 作者简介:陈厚彬,Tel/Fax:020-85280231;E-mail:hbchen@scau.edu.cn
  • 基金资助:

    国家现代农业产业技术体系(CARS-33)

Progresses in Research of Litchi Floral Differentiation

 CHEN  Hou-Bin, SU  Zuan-Xian, ZHANG  Rong, ZHANG  Hong-Na, DING  Feng, ZHOU  Bi-Yan   

  1. College of Horticulture, South China Agricultural University, Guangzhou 510642
  • Received:2013-09-28 Online:2014-05-01 Published:2014-02-21

摘要: The commercial production of litchi (Litchi chinensis Sonn.), a subtropical evergreen fruit tree, has been restricted in the two narrow areas of 17o-32o latitude in the north and south hemispheres. Within the multiple cultivars-based industrial structures, unreliable flowering has taken place in almost all litchi cultivars. The flowering status of varieties, flower bud differentiation stage performance, influence factors, flower bud differentiation mechanism and flowering regulation are reviewed in this paper. It is considered that, litchi trees must have fully matured terminal shoots in autumn and be florally induced under chill conditions for a quite long period during the winter. Primordial inflorescence initiated upon the ascending temperatures and with release of water stresses during late winter or early spring, the inflorescence and flowers developed at mild conditions with warm days and cool nights. Any one unsatisfactory factor during the phase changes might cause failure of flower formation. The major factors influencing litchi floral development are state of terminal shoots, temperatures and water. Carbohydrate accumulation in shoots and the endogenous hormones affect flowering. In order to solve the instability problem in production of flowering and ensure good flowering under extreme and marginal conditions, the molecular mechanism about litchi floral differentiation and why young shoots and leaves could not be florally induced with chills, how the chill signals perceived and transduced, stimulate the floral transition of the terminal buds, when and how the flower sex is determined should be studied, and to explore nutrient, water management, growth regulators and other mechanical measures according to the phase changes of floral differentiation.

关键词: litchi (Litchi chinensis Sonn.) , floral induction , floral initiation and development , phase change , shoot state , temperature , water

Abstract: The commercial production of litchi (Litchi chinensis Sonn.), a subtropical evergreen fruit tree, has been restricted in the two narrow areas of 17o-32o latitude in the north and south hemispheres. Within the multiple cultivars-based industrial structures, unreliable flowering has taken place in almost all litchi cultivars. The flowering status of varieties, flower bud differentiation stage performance, influence factors, flower bud differentiation mechanism and flowering regulation are reviewed in this paper. It is considered that, litchi trees must have fully matured terminal shoots in autumn and be florally induced under chill conditions for a quite long period during the winter. Primordial inflorescence initiated upon the ascending temperatures and with release of water stresses during late winter or early spring, the inflorescence and flowers developed at mild conditions with warm days and cool nights. Any one unsatisfactory factor during the phase changes might cause failure of flower formation. The major factors influencing litchi floral development are state of terminal shoots, temperatures and water. Carbohydrate accumulation in shoots and the endogenous hormones affect flowering. In order to solve the instability problem in production of flowering and ensure good flowering under extreme and marginal conditions, the molecular mechanism about litchi floral differentiation and why young shoots and leaves could not be florally induced with chills, how the chill signals perceived and transduced, stimulate the floral transition of the terminal buds, when and how the flower sex is determined should be studied, and to explore nutrient, water management, growth regulators and other mechanical measures according to the phase changes of floral differentiation.

Key words: litchi (Litchi chinensis Sonn.) , floral induction , floral initiation and development , phase change , shoot state , temperature , water