Xiaoli Li, Shiyan Lu, Yaru Yang, Wenjie Wei, Jiali Wei, Xiaojun Yuan^*, Ping Li^*

Phyton-International Journal of Experimental Botany, Vol.90, No.5, pp. 1387-1400, 2021, DOI:10.32604/phyton.2021.016362

Abstract It is known that the high level of sugar including glucose suppresses seed germination through ABA signal. ABI5 is an essential component to mediate ABA-dependent seed germination inhibition, but underlying mechanism needs more investigation. Previous study demonstrated the PIF4 activated the expression of ABI5 to suppress seed germination in darkness. Here we reported that PIF4 also mediated the seed germination inhibition through ABI5 under high concentration of glucose treatment. Furthermore, we found that PIF4 interacted with PAP1, the central factor to control anthocyanin biosynthesis. Such interaction was confirmed in vitro and in planta. Biochemical and physiological analysis revealed that PAP1… More >

Wenjie Wei, Yulan Hu, Wenjuan Yang, Xiaoli Li, Jiali Wei, Xiangyang Hu, Ping Li^*

Phyton-International Journal of Experimental Botany, Vol.90, No.4, pp. 1075-1087, 2021, DOI:10.32604/phyton.2021.016134

Abstract Seed germination or dormancy status is strictly controlled by endogenous phytohormone and exogenous environment signals. Abscisic acid (ABA) is the important phytohormone to suppress seed germination. Ambient high temperature (HT) also suppressed seed germination, or called as secondary seed dormancy, through upregulating ABI5, the essential component of ABA signal pathway. Previous result shows that appropriate nitric oxide (NO) breaks seed dormancy through triggering S-nitrosoglutathion reductase (GSNOR1)-dependent S-nitrosylation modification of ABI5 protein, subsequently inducing the degradation of ABI5. Here we found that HT induced the degradation of GSNOR1 protein and reduced its activity, thus accumulated more reactive nitrogen species (RNS) to… More >

Danni He, Guoli Deng, Songpei Ying, Wenjuan Yang, Jiali Wei, Ping Li^*

Phyton-International Journal of Experimental Botany, Vol.89, No.3, pp. 633-643, 2020, DOI:10.32604/phyton.2020.010498

Abstract Primary seed dormancy is an adaptive strategy that prevents germination for viable seeds in harsh environment, ensuring seeds germination under favorable condition. Accurately inducing seeds germination in a controllable manner is important for crop production. Thus searching the chemicals that efficiently breaks seed dormancy is valuable. DOG1 protein abundance in the freshly harvested seed is high, and its level is correlated to seed dormancy intensity, thus DOG1 is regarded as the timer to evaluate the seed dormancy degree. In this study, we found the carbon monoxide (CO) donor treatment, the transgenic line with high CO content, showed lower seed dormancy,… More >

Qili Zhang, Danni He, Songbei Ying, Shiyan Lu, Jiali Wei, Ping Li^*

Phyton-International Journal of Experimental Botany, Vol.89, No.3, pp. 619-631, 2020, DOI:10.32604/phyton.2020.010379

Abstract Seeds germination is strictly controlled by environment factor such as high temperature (HT) through altering the balance between gibberellin acid (GA) and abscisic acid (ABA). Gama-aminobutyric acid (GABA) is a small molecule with four-carbon amino acid, which plays a crucial role during plant physiological process associated with pollination, wounding or abiotic stress, but its role in seeds germination under HT remains elusive. In this study we found that HT induced the overaccumulation of ROS, mainly H₂O₂ and O₂^- , to suppress seeds germination, meanwhile, HT also activated the enzyme activity of GAD for the rapid accumulation of GABA, hinting the… More >