Franklin-Tong Vernonica E, Franklin F C H
School of Biosciences, The University of Birmingham, Edgbaston, Birmingham B15 2TT, UK.
Philos Trans R Soc Lond B Biol Sci. 2003 Jun 29;358(1434):1025-32. doi: 10.1098/rstb.2003.1287.
Self-incompatibility (SI) involves the recognition and rejection of self or genetically identical pollen. Gametophytic SI is probably the most widespread of the SI systems and, so far, two completely different SI mechanisms, which appear to have evolved separately, have been identified. One mechanism is the RNase system, which is found in the Solanaceae, Rosaceae and Scrophulariaceae. The other is a complex system, so far found only in the Papaveraceae, which involves the triggering of signal transduction cascade(s) that result in rapid pollen tube inhibition and cell death. Here, we present an overview of what is currently known about the mechanisms involved in controlling pollen tube inhibition in these two systems.
自交不亲和性(SI)涉及对自身或基因相同花粉的识别和排斥。配子体自交不亲和性可能是最广泛存在的自交不亲和系统,到目前为止,已经鉴定出两种似乎是独立进化的完全不同的自交不亲和机制。一种机制是核糖核酸酶系统,见于茄科、蔷薇科和玄参科。另一种是复杂系统,目前仅在罂粟科中发现,该系统涉及触发信号转导级联反应,导致花粉管迅速抑制和细胞死亡。在此,我们概述了目前已知的这两种系统中控制花粉管抑制的机制。