Rice(Oryza sativa L.)production is threatened by global warming associated with extreme high temperatures,and rice heat sensitivity is differed when stress occurs between daytime and nighttime.However,the underlying m...Rice(Oryza sativa L.)production is threatened by global warming associated with extreme high temperatures,and rice heat sensitivity is differed when stress occurs between daytime and nighttime.However,the underlying molecular mechanism are largely unknown.We show here that two glycine-rich RNA binding proteins,Os GRP3 and Os GRP162,are required for thermotolerance in rice,especially at nighttime.The rhythmic expression of Os GRP3/Os GRP162 peaks at midnight,and at these coincident times,is increased by heat stress.This is largely dependent on the evening complex component Os ELF3-2.We next found that the double mutant of Os GRP3/Os GRP162 is strikingly more sensitive to heat stress in terms of survival rate and seed setting rate when comparing to the wild-type plants.Interestingly,the defect in thermotolerance is more evident when heat stress occurred in nighttime than that in daytime.Upon heat stress,the double mutant of Os GRP3/Os GRP162 displays globally reduced expression of heat-stress responsive genes,and increases of m RNA alternative splicing dominated by exon-skipping.This study thus reveals the important role of Os GRP3/Os GRP162 in thermotolerance in rice,and unravels the mechanism on how Os GRP3/Os GRP162 regulate thermotolerance in a diurnal manner.展开更多
High temperature stress poses significant adverse effects on crop yield and quality.Yet the molecular mechanisms underlying heat stress tolerance in plants/crops,especially regarding the organellar remodeling and home...High temperature stress poses significant adverse effects on crop yield and quality.Yet the molecular mechanisms underlying heat stress tolerance in plants/crops,especially regarding the organellar remodeling and homeostasis,are largely unknown.In a recent study,Zhou et al.reported that autophagy-related 8(ATG8),a famous regulator involved in autophagy,plays a new role in Golgi restoration upon heat stress.Golgi apparatus is vacuolated following short-term acute heat stress,and ATG8 is translocated to the dilated Golgi membrane and interacts with CLATHRIN LIGHT CHAIN 2(CLC2)to facilitate Golgi restoration,which is dependent on the ATG conjugation system,but not of the upstream autophagic initiators.These exciting findings broaden the fundamental role of ATG8,and elucidate the organelle-level restoration mechanism of Golgi upon heat stress in plants.展开更多
基金the State Key Project of Research and Development Plan of China(2022YFF1001603 and2021YFF1000404)the Natural Science Foundation of Zhejiang,China(LD21C020001)。
文摘Rice(Oryza sativa L.)production is threatened by global warming associated with extreme high temperatures,and rice heat sensitivity is differed when stress occurs between daytime and nighttime.However,the underlying molecular mechanism are largely unknown.We show here that two glycine-rich RNA binding proteins,Os GRP3 and Os GRP162,are required for thermotolerance in rice,especially at nighttime.The rhythmic expression of Os GRP3/Os GRP162 peaks at midnight,and at these coincident times,is increased by heat stress.This is largely dependent on the evening complex component Os ELF3-2.We next found that the double mutant of Os GRP3/Os GRP162 is strikingly more sensitive to heat stress in terms of survival rate and seed setting rate when comparing to the wild-type plants.Interestingly,the defect in thermotolerance is more evident when heat stress occurred in nighttime than that in daytime.Upon heat stress,the double mutant of Os GRP3/Os GRP162 displays globally reduced expression of heat-stress responsive genes,and increases of m RNA alternative splicing dominated by exon-skipping.This study thus reveals the important role of Os GRP3/Os GRP162 in thermotolerance in rice,and unravels the mechanism on how Os GRP3/Os GRP162 regulate thermotolerance in a diurnal manner.
基金financially supported by grants from the State Key Project of Research and Development Plan(2021YFF1000404,2022YFF1001603).
文摘High temperature stress poses significant adverse effects on crop yield and quality.Yet the molecular mechanisms underlying heat stress tolerance in plants/crops,especially regarding the organellar remodeling and homeostasis,are largely unknown.In a recent study,Zhou et al.reported that autophagy-related 8(ATG8),a famous regulator involved in autophagy,plays a new role in Golgi restoration upon heat stress.Golgi apparatus is vacuolated following short-term acute heat stress,and ATG8 is translocated to the dilated Golgi membrane and interacts with CLATHRIN LIGHT CHAIN 2(CLC2)to facilitate Golgi restoration,which is dependent on the ATG conjugation system,but not of the upstream autophagic initiators.These exciting findings broaden the fundamental role of ATG8,and elucidate the organelle-level restoration mechanism of Golgi upon heat stress in plants.
