Effect of ultra-low temperature storage on the viability of pepper pollen and its implications for hybrid breeding - Du, Kanghua; Zhang, Da; Ma, Jixian; Dan, Zhong; Wen, Xianqin; Lv, Weiwu; Yang, Long; Bao, Lingfeng; Li, Yirong; Chen, Guangping; Zhang, Jie; Mu, Wanfu (Frontiers in Plant Science, 2025)