Publications by authors named "Tong-Xin Zheng"
Article Synopsis
- Five new pregnane C21-steroids were identified from the roots of Cynanchum bungei, including three previously unknown 5,6-epoxy steroids and two 8,14-seco-steroids.
- Compound 3 is notable for being the first 5a,6a-epoxy steroid discovered in Cynanchum plants, with their structures confirmed through various spectroscopic methods and theoretical calculations.
- All isolated compounds showed anti-inflammatory properties by inhibiting nitric oxide release in RAW264.7 cells, with compounds 3 and 4 demonstrating stronger activity than the commonly used anti-inflammatory drug indomethacin at a concentration of 50 μM.
The number of pollen grains is a critical determinant of reproductive success in seed plants and varies among species and individuals. However, in contrast with many mutant-screening studies relevant to anther and pollen development, the natural genetic basis for variations in pollen number remains largely unexplored. To address this issue, we carried out a genome-wide association study in maize, ultimately revealing that a large presence/absence variation in the promoter region of ZmRPN1 alters its expression level and thereby contributes to pollen number variation.
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