固氮树，金合欢属：花粉管生长的定量细胞学。

Self-incompatibility in the nitrogen-fixing tree, Acacia retinodes: quantitative cytology of pollen tube growth.

机构信息

Plant Cell Biology Research Centre, School of Botany, University of Melbourne, 3052, Parkville, Victoria, Australia.

出版信息

Theor Appl Genet. 1985 Mar;69(5-6):481-8. doi: 10.1007/BF00251089.

Abstract

A 10×10 diallel of crosses involving trees in two natural populations of A. retinodes (Leguminosae: Mimosoideae) showed a high level of self-incompatibility, with ISI (Index of Self-Incompatibility) of 0.08. In both self- and cross pollinations, pollen tubes grew through the style to the ovules within 11 h. Tube growth rate is approximately similar in both types of mating: 3.3 to 4.5 μm/min for the first 6 h, and 1.2 to 2.0 μm/min for the succeeding 5 h. Three potential explanations for self incompatibility are proposed: (1) an S-gene controlled system in which pollen tubes are arrested in the nucellus of the ovule; (2) sperm: egg interactions at fertilization and (3) action of post-zygotic lethal genes.

摘要

一项涉及两个自然种群的 A. retinodes（豆科：含羞草科）树木的 10×10 双列杂交试验表明，存在高度的自交不亲和性，ISI（自交不亲和指数）为 0.08。在自花授粉和异花授粉中，花粉管都在 11 小时内穿过花柱到达胚珠。两种交配类型的管生长速度大致相似：在前 6 小时内，约为 3.3 到 4.5 μm/min，在后 5 小时内，约为 1.2 到 2.0 μm/min。提出了三种自交不亲和的潜在解释：（1）S 基因控制的系统，其中花粉管在胚珠的珠心处被阻止；（2）受精时的精子：卵子相互作用和（3）合子后致死基因的作用。