Competition between anthocyanin and kaempferol glycosides biosynthesis affects pollen tube growth and seed set of Malus
作者机构：State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of AppleCollege of HorticultureNorthwest A&F UniversityYanglingShaanxi 712100China College of Food Science and TechnologyNorthwest UniversityXi'anShaanxi 710069China The New Zealand Institute for Plant and Food Research LtdPrivate Bag92169 AucklandNew Zealand
出 版 物：《Horticulture Research》 (园艺研究（英文）)
年 卷 期：2021年第8卷第1期
页 面：2439-2455页
核心收录：
学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学]
基 金：This work was funded by the National Key R&D Program(2018YFD1000200) the National Natural Science Foundation(31972366)of China
主 题：kaempferol slower upstream
摘 要：Flavonoids play important roles in regulating plant growth and *** this study,three kaempferol 3-O-glycosides were identi fi ed and mainly accumulated in fl owers but not in leaves or fruits of *** Malus,fl ower petal color is normally white,but some genotypes have red fl owers containing *** biosynthesis appears to be in competition with kaempferol 3-O-glycosides production and controlled by the biosynthetic *** white fl ower Malus genotypes had better-developed seeds than the red fl ower *** fl owers,the overexpression of MYB10 in Malus domestica enhanced the accumulation of anthocyanin,but decreased that of kaempferol *** pollination the transgenic plants showed slower pollen tube growth and fewer developed *** application ofdifferent fl avonoid compounds suggested that kaempferol 3-O-glycosides,especially kaempferol 3-O-rhamnoside,regulated pollen tube growth and seed set rather than cyanidin or quercetin *** was found that kaempferol 3-O-rhamnoside might regulate pollen tube growth through effects on auxin,the Rho of plants(ROP)GTPases,calcium and the phosphoinositides signaling *** the inhibition of auxin transport,the transcription levels of Heat Shock Proteins(HSPs)and ROP GTPases were downregulated while the levels were not changed or even enhanced when blocking calcium signaling,suggesting that HSPs and ROP GTPases were downstream of auxin signaling,but upstream of calcium *** summary,kaempferol glycoside concentrations in pistils correlated with auxin transport,the transcription of HSPs and ROP GTPases,and calcium signaling in pollen tubes,culminating in changes to pollen tube growth and seed set.
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