2017年12月22日，该文章与北京大学瞿礼嘉的文章同时发表于Science。该文章讲述了RALF4和RALF19可以与LRX蛋白相互作用，调控花粉管的生长，而瞿礼嘉的文章讲述了BUPS1和BUPS2与受体ANXUR1和ANXUR2相互作用，并且他们可结合于RALF4，RALF19和RALF34，调控花粉管的完整性和精细胞的释放。

瞿礼嘉的文章本公众号之前已经介绍过，详情参见：《Science∣北京大学瞿礼嘉课题组揭示植物调控花粉管细胞完整性与精细胞释放的分子机制》

本文原题目为：

RALF4/19 peptides interact with LRX proteins to control pollen tube growth in Arabidopsis

细胞外基质与细胞内部变化的交流，对于细胞的功能是至关重要的。已经鉴定出RALF家族的细胞外肽为CrRLK1L亚类的类受体激酶的配体，但是他们确切的感受机制还不清楚。我们发现拟南芥RALF4和RALF19冗余地调节花粉管的完整性和生长，其功能依赖于在花粉中表达的LRX 家族蛋白，LRX 家族蛋白在细胞壁发育中起作用，但其作用方式尚不清楚。LRX蛋白与RALFs相互作用，监测细胞壁变化，通过CrRLK1L途径传递到花粉管内部，从而维持花粉管正常生长。

The communication of changes in the extracellular matrix to the interior of the cell is crucial for a cell’s function. The extracellular peptides of the RAPID ALKALINIZATION FACTOR (RALF) family have been identified as ligands of receptor-like kinases of the CrRLK1L subclass, but the exact mechanism of their perception is unclear. We found that Arabidopsis RALF4 and RALF19 redundantly regulate pollen tube integrity and growth, and that their function depends on pollen-expressed proteins of the LEUCINE-RICH REPEAT EXTENSIN (LRX) family, which play a role in cell wall development but whose mode of action is not understood. The LRX proteins interact with RALFs, monitoring cell wall changes, which are communicated to the interior of the pollen tube via the CrRLK1L pathway to sustain normal growth.

每日一词

matrix

英[ˈmeɪtrɪks]

美[ˈmetrɪks]

n. 基质; <数>矩阵; 模型; 母体，子宫;

[例句]The basis matrix B is unimodular.

基矩阵b是幺模的。

[其他] 复数：matrices