TY - JOUR
T1 - Molecular Determinants and Mechanisms of Gametophytic Self-Incompatibility in Fruit Trees of Rosaceae
AU - Wu, Jun
AU - Gu, Chao
AU - Khan, M. Awais
AU - Wu, Juyou
AU - Gao, Yongbing
AU - Wang, Chunlei
AU - Korban, Schuyler S.
AU - Zhang, Shaoling
N1 - Funding Information:
The authors wish to thank Dr. A. Lane Rayburn and Dr. Jack Juvik for their critical evaluation of this manuscript. This work was supported by the National Natural Science Foundation of China (31071759) and the Jiangsu Province Science and Technology Support Funds (BE2011320). In addition, partial support was provided by the University of Illinois Office of Research Project 875-325 and Project 875-922.
PY - 2013/1
Y1 - 2013/1
N2 - Self-incompatibility is an important genetic mechanism that prevents inbreeding and promotes genetic polymorphism and heterosis in flowering plants. Many fruit species in the Rosaceae, including apple, pear, plum, apricot, sweet cherry, Japanese apricot, and almond, exhibit typical gametophytic self-incompatibility (GSI) controlled by an apparently single multi-allelic locus. This locus encodes at least two components from both the pollen and the pistil, and controls recognition of self- and non-self pollen. Recently, the GSI system has been investigated at the molecular and cellular levels in Rosaceae, and findings have provided some important insights as to how these two genes interact within pollen tubes that lead to specific inhibition of germination and/or growth of self-pollen tubes. In this review, molecular features of S-determinants of both pistil and pollen, identification of S-alleles, mechanisms of self-incompatibility break-down, and evolution of S-alleles are presented. Moreover, hypothetical signal transduction models in a self-incompatible system in Rosaceae are proposed based on recent findings that indicate that several signal factors are involved in GSI responses.
AB - Self-incompatibility is an important genetic mechanism that prevents inbreeding and promotes genetic polymorphism and heterosis in flowering plants. Many fruit species in the Rosaceae, including apple, pear, plum, apricot, sweet cherry, Japanese apricot, and almond, exhibit typical gametophytic self-incompatibility (GSI) controlled by an apparently single multi-allelic locus. This locus encodes at least two components from both the pollen and the pistil, and controls recognition of self- and non-self pollen. Recently, the GSI system has been investigated at the molecular and cellular levels in Rosaceae, and findings have provided some important insights as to how these two genes interact within pollen tubes that lead to specific inhibition of germination and/or growth of self-pollen tubes. In this review, molecular features of S-determinants of both pistil and pollen, identification of S-alleles, mechanisms of self-incompatibility break-down, and evolution of S-alleles are presented. Moreover, hypothetical signal transduction models in a self-incompatible system in Rosaceae are proposed based on recent findings that indicate that several signal factors are involved in GSI responses.
KW - Rosaceae
KW - S-RNase
KW - SFB/SLF
KW - fertilization
KW - fruit trees
KW - pollination
KW - self-incompatibility
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U2 - 10.1080/07352689.2012.715986
DO - 10.1080/07352689.2012.715986
M3 - Article
AN - SCOPUS:84870591255
SN - 0735-2689
VL - 32
SP - 53
EP - 68
JO - Critical Reviews in Plant Sciences
JF - Critical Reviews in Plant Sciences
IS - 1
ER -