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首页> 外文期刊>Genomics >Characterization of the pectin methyl-esterase gene family and its function in controlling pollen tube growth in pear (Pyrus bretschneideri)
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Characterization of the pectin methyl-esterase gene family and its function in controlling pollen tube growth in pear (Pyrus bretschneideri)

机译：果胶甲基酯酶基因家族的表征及其在梨（Pyrus Bretschneideri）控制花粉管生长中的作用

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摘要

Pectin methyl-esterases (PMEs) play crucial roles in plant growth. In this study, we identified 81 PbrPMEs in pear. Whole-genome duplication and purifying selection drove the evolution of PbrPME gene family. The expression of 47 PbrPMEs was detected in pear pollen tube, which were assigned to 13 clusters by an expression tendency analysis. One of the 13 clusters presented opposite expression trends towards the changes of methyl-esterified pectins at the apical cell wall. PbrPMEs were localized in the cytoplasm and plasma membrane. Repression of PbrPME11, PbrPME44, and PbrPME59 resulted in the inhibition of pear pollen tube growth and abnormal deposition of methyl-esterified pectins at pollen tube tip. Pharmacological analysis confirmed that reduced PbrPME activities repressed the pollen tube growth. Overall, we have explored the evolutionary characteristics of PbrPME gene family and found the key PbrPME genes that control the growth of pollen tube, which deepened the understanding of pear fertility regulation.
机译：果胶甲基酯酶（PMES）在植物生长中起重要作用。在这项研究中，我们鉴定了梨中的81个PBRPME。全基因组重复和净化选择推动了PBRPME基因家族的演变。在梨花管中检测到47个PBRPME的表达，通过表达倾向分析分配给13个簇。其中13个簇中的一种表达表达趋势朝着顶端细胞壁处的甲基酯化果胶的变化的表达趋势。 PBRPME在细胞质和血浆膜中定位。抑制PBRPME11，PBRPME44和PBRPME59导致抑制花粉管生长和甲基酯化果胶的异常沉积在花粉尖端。药理学分析证实，降低的PBRPME活性减少了花粉管的生长。总体而言，我们探讨了PBRPME基因家族的进化特征，发现控制花粉管生长的关键PBRPME基因，这加深了对梨生育调节的理解。

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