Exogenous cGMP regulates seed germination of ryegrass under salt stress

Meifei, 宿梅飞 Sui; Xiaohong, 魏小红 Wei; Xiaqing, 辛夏青 Xin; Kai, 岳凯 Yue; Ying, 赵颖 Zhao; Ting, 韩厅 Han; Wenjing, 马文静 Ma; Qiaojuan, 骆巧娟 Luo

doi:10.5846/stxb201801140105

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“…Each treatment included three biological replicates. The following equations were used: Germination rate (%) = number of germinated seeds on the 7th day/total number of seeds × 100% [ 71 ], germination energy (%) = number of germinated seeds on the 4th day/total number of seeds × 100% [ 72 ].…”

Section: Methodsmentioning

confidence: 99%

Transcriptome Analysis Reveals Novel Insights into the Hyperaccumulator Phytolacca acinosa Roxb. Responses to Cadmium Stress

Xie,

Deng,

et al. 2024

Plants

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Cadmium (Cd) is a highly toxic heavy metal that causes serious damage to plant and human health. Phytolacca acinosa Roxb. has a large amount of aboveground biomass and a rapid growth rate, and it has been identified as a novel type of Cd hyperaccumulator that can be harnessed for phytoremediation. However, the molecular mechanisms underlying the response of P. acinosa to Cd2+ stress remain largely unclear. In this study, the phenotype, biochemical, and physiological traits of P. acinosa seeds and seedlings were analyzed under different concentrations of Cd2+ treatments. The results showed higher Cd2+ tolerance of P. acinosa compared to common plants. Meanwhile, the Cd2+ content in shoots reached 449 mg/kg under 10 mg/L Cd2+ treatment, which was obviously higher than the threshold for Cd hyperaccumulators. To investigate the molecular mechanism underlying the adaptability of P. acinosa to Cd stress, RNA-Seq was used to examine transcriptional responses of P. acinosa to Cd stress. Transcriptome analysis found that 61 genes encoding TFs, 48 cell wall-related genes, 35 secondary metabolism-related genes, 133 membrane proteins and ion transporters, and 96 defense system-related genes were differentially expressed under Cd2+ stress, indicating that a series of genes were involved in Cd2+ stress, forming a complex signaling regulatory mechanism. These results provide new scientific evidence for elucidating the regulatory mechanisms of P. acinosa response to Cd2+ stress and new clues for the molecular breeding of heavy metal phytoremediation.

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Section: Methodsmentioning

confidence: 99%