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The PyPIF5-PymiR156a-pyspl9-PyMYB114/ MYB10 module regulates light-induced anthocyanin biosynthesis in red pear

Molecular Horticulture 2021年第1期1卷 31-44页

作者： Hainan Liu Qun Shu Kui Lin-Wang Andrew CAllan Richard VEspley Jun Su Maosong Pei Jun Wu College of Horticulture State Key Laboratory of Crop Genetics and Germplasm EnhancementNanjing Agricultural UniversityNanjing 210095China College of Horticulture and Plant Conservation Henan University of Science and TechnologyLuoyang 471023China Institute of Horticulture Yunnan Academy of Agricultural SciencesKunming 650205China The New Zealand Institute for Plant&Food Research Limited AucklandNew Zealand School of Biological Sciences University of AucklandAucklandNew Zealand

Some cultivars of pear(Pyrus L.)show attractive red fruit skin due to anthocyanin *** pigmentation can be affected by environmental conditions,especially *** explore the light-induced regulation network for anthocyanin biosynthesis and fruit coloration in pear,small RNA libraries and mRNA libraries from fruit skins of‘Yunhongyihao’pear were constructed to compare the difference between bagging and debagging *** of RNA-seq of fruit skins with limited light(bagged)and exposed to light(debagged),showed that PyPIF5 was down-regulated after bag ***156a was also differentially expressed between bagged and debagged fruit *** found that PyPIF5 negatively regulated PymiR156a expression in bagged fruits by directly binding to the G-box motif in its *** addition,PymiR156a overexpression promoted anthocyanin accumulation in both pear skin and apple *** confirmed that PymiR156a mediated the cleavage of pyspl9,and that the target pyspl9 protein could form heterodimers with two key anthocyanin regulators(PyMYB114/PyMYB10).We proposed a new module of PyPIF5-PymiR156a-pyspl9-PyMYB114/*** the bagged fruits were re-exposed to light,PyPIF5 was down-regulated and its inhibitory effect on PymiR156a was weakened,which leads to degradation of the target pyspl,thus eliminating the blocking effect of pyspl on the formation of the regulatory MYB ***,this promotes anthocyanin biosynthesis in pear skin.

关键词： Red-skinned pear Anthocyanin PyPIF5 PymiR156a pyspl9 PyMYB114/MYB10

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