花柱(英語:style),是雌蕊的一部分,連接柱頭子房。花柱通常為管狀,並可為空心或實心。花粉管在柱頭萌發後生長經過花柱內部而到達胚珠,在一些例子中花柱也負責執行孢子體自交不親和性,可阻止花粉管完全生長[1]。花柱可能具有引導花粉管抵達胚珠的作用,具體方法可能是透過花粉管與花柱通道的黏著[2]

花柱的位置
花柱頂生
花柱側生
花柱基生

花柱长度变异现象编辑

某些植物同一物种的花柱长度存在变异。例如小花风毛菊的花柱及其柱头分叉长度会随着海拔的升高显著增长[3]欧洲千里光的花柱长度可分为长柱型和短柱型[4]

花柱长度的变异可能与大小、花粉体积、花粉管生长速率、花粉败育比率等有关,更长的花柱可能更有利于传粉和繁殖[5]

參考資料编辑

  1. ^ McClure BA; 等. Style self-incompatibility gene products of Nicotiana alata are ribonucleases.. Nature. 1989-12-21 [2015-01-22]. (原始内容存档于2015-01-22). 
  2. ^ Sun Tae Kim, Elizabeth M. Lord. Exogenous Free Ubiquitin Enhances Lily Pollen Tube Adhesion to an in Vitro Stylar Matrix and May Facilitate Endocytosis of SCA. Plant Physiology. 2006-12. 
  3. ^ Yi-Feng, Wang; Hong-Yan, G. a. O.; Hai-Yan, S. H. I.; Jian-Hong, Wang; Guo-Zhen, D. U. ADAPTIVE SIGNIFICANCE OF SAUSSUREA PARVIFLORA’S SEXUAL ORGANS, QINGHAI-TIBETAN PLATEAU, CHINA. Chinese Journal of Plant Ecology. 2008-03-30, 32 (2): 379. doi:10.3773/j.issn.1005-264x.2008.02.015. 
  4. ^ Love, John; Graham, Sean W.; Irwin, Judith A.; Ashton, Paul A.; Bretagnolle, Francois; Abbott, Richard J. Self-pollination, style length development and seed set in self-compatible Asteraceae: evidence from Senecio vulgaris L.. Plant Ecology & Diversity. 2016-07-03, 9 (4): 371–379. doi:10.1080/17550874.2016.1244576. 
  5. ^ Xiaoyue, Wang; Xinxin, Zhu; Juan, Yang; Yunjing, Liu; Xiaoxin, Tang. Variation in style length and the effect on reproductive success in Chinese plums (Armeniaca mume). Biodiversity Science. 2019, 27 (2): 159–167. doi:10.17520/biods.2018317.