Gravitropic curvature growth of Arabidopsis hypocotyls mainly occurred in the rapid growing Elongation Zone(EZI),not in the slow-growing Elongation Zone(EZII).By examining reorientation of Microtubules(MT)and phenotyp...Gravitropic curvature growth of Arabidopsis hypocotyls mainly occurred in the rapid growing Elongation Zone(EZI),not in the slow-growing Elongation Zone(EZII).By examining reorientation of Microtubules(MT)and phenotype of the cell wall in the EZI and the EZII of Arabidopsis hypocotyls under normal gravitational condition,it is found that MTs in the rapid growing epidermal cells were mainly in the transverse direction,while those in the non-growing epidermal cells were in the longitudinal directions.However,this difference in cortical MT arrays between the EZI and EZII cells disappeared when the seedlings were exposed to the simulated microgravity condition on a horizontal clinostat.Field emission scanning electron microscopy revealed that the surface texture of epidermal cells,like the direction of the MT,in the EZI and the EZII also became similar when exposed to the simulated microgravity condition.This result indicated that simulate microgravity could modify the potential differentiation between the EZI and the EZII by affecting the orientation of cortical MT in the epidermal cells.展开更多
Cotton is one of the most important cash crops,its growth season coincides with a high incidence of diverse groups of pests,leading to heavy use of pesticides.Recent identification of a signaling protein as a candidat...Cotton is one of the most important cash crops,its growth season coincides with a high incidence of diverse groups of pests,leading to heavy use of pesticides.Recent identification of a signaling protein as a candidate regulator of cotton extrafloral nectary provides a new insight into the formation of sophisticated defense mechanisms in plants.展开更多
Cotton plants are not only the global crops integrating fiber,oil and protein(Hu et al.2020;Xiao et al.2017),but also the medicinal plants with potent application values,which were well described in the most complete ...Cotton plants are not only the global crops integrating fiber,oil and protein(Hu et al.2020;Xiao et al.2017),but also the medicinal plants with potent application values,which were well described in the most complete and comprehensive medical book such as Compendium of Materia Medica and Chinese Materia Medica.Cot-ton extract has various activities such as stopping bleed-ing,relieving pain,removing phlegm,and curing chronic bronchitis.Different types of metabolites or defense compounds are produced in cotton plants.展开更多
With the human space exploration activities, space life science is an emerging interdiscipline,which covers a wide range of researches. Based on our country's manned space station and recoverable satellite science...With the human space exploration activities, space life science is an emerging interdiscipline,which covers a wide range of researches. Based on our country's manned space station and recoverable satellite science experimental platform, the development of space life science research is very important to acquire new knowledge or new technological innovation, to give further services to the human space exploration activities,to improve the national economic and social development. Both ground-based and flight applied studies were continuously performed in the previous 2 years. Here, we review and summarize the researches on space life sciences contributed by Chinese scientists.展开更多
The ABCDE model has been described comprehensively to interpret the mechanism of floral organ development. In Arabidopsis, AGMAOUS was a well-studied class C gene encoding a transcription factor with MADS box, and its...The ABCDE model has been described comprehensively to interpret the mechanism of floral organ development. In Arabidopsis, AGMAOUS was a well-studied class C gene encoding a transcription factor with MADS box, and its overexpression in Arabidopsis induced the transformation of sepals to carpels and petals to stamens. However, there is little knowledge about the function of OsMADS58, which was a homologue of AGMAOUS in rice. In our study, OsMADS58 driven by the UBIQUITIN promoter was ectopiely expressed in Arabidopsis., and carpel-like sepals, incomplete petals and stamens instead of petals were found in different transgenie plants according to different OsMADS58 mRNA expression levels. The phenotype of transgenic plant was similar to the AGMAOUS overexpression plant, suggesting that OsMADS58 might play an important role in flower development like AGMAOUS and they keep conserved function during evolution.展开更多
基金Supported by the China Manned Space Flight Technology Project TG-2the National Natural Science Foundation of China(31670864)+2 种基金the National Natural Fund Joint Fund Project(U1738106)the Strategic Pioneer Projects of CAS(XDA15013900)the National Science Foundation for Young Scientists of China(31500687)
文摘Gravitropic curvature growth of Arabidopsis hypocotyls mainly occurred in the rapid growing Elongation Zone(EZI),not in the slow-growing Elongation Zone(EZII).By examining reorientation of Microtubules(MT)and phenotype of the cell wall in the EZI and the EZII of Arabidopsis hypocotyls under normal gravitational condition,it is found that MTs in the rapid growing epidermal cells were mainly in the transverse direction,while those in the non-growing epidermal cells were in the longitudinal directions.However,this difference in cortical MT arrays between the EZI and EZII cells disappeared when the seedlings were exposed to the simulated microgravity condition on a horizontal clinostat.Field emission scanning electron microscopy revealed that the surface texture of epidermal cells,like the direction of the MT,in the EZI and the EZII also became similar when exposed to the simulated microgravity condition.This result indicated that simulate microgravity could modify the potential differentiation between the EZI and the EZII by affecting the orientation of cortical MT in the epidermal cells.
文摘Cotton is one of the most important cash crops,its growth season coincides with a high incidence of diverse groups of pests,leading to heavy use of pesticides.Recent identification of a signaling protein as a candidate regulator of cotton extrafloral nectary provides a new insight into the formation of sophisticated defense mechanisms in plants.
基金This research was supported by grants from the National Natural Science Foundation of China(31788103)the Chinese Academy of Sciences(XDB27020207).
文摘Cotton plants are not only the global crops integrating fiber,oil and protein(Hu et al.2020;Xiao et al.2017),but also the medicinal plants with potent application values,which were well described in the most complete and comprehensive medical book such as Compendium of Materia Medica and Chinese Materia Medica.Cot-ton extract has various activities such as stopping bleed-ing,relieving pain,removing phlegm,and curing chronic bronchitis.Different types of metabolites or defense compounds are produced in cotton plants.
文摘With the human space exploration activities, space life science is an emerging interdiscipline,which covers a wide range of researches. Based on our country's manned space station and recoverable satellite science experimental platform, the development of space life science research is very important to acquire new knowledge or new technological innovation, to give further services to the human space exploration activities,to improve the national economic and social development. Both ground-based and flight applied studies were continuously performed in the previous 2 years. Here, we review and summarize the researches on space life sciences contributed by Chinese scientists.
基金Supported by the National Natural Science Foundation of China (31070265)the Natural Science Foundation of Shanghai (10ZR1434800)
文摘The ABCDE model has been described comprehensively to interpret the mechanism of floral organ development. In Arabidopsis, AGMAOUS was a well-studied class C gene encoding a transcription factor with MADS box, and its overexpression in Arabidopsis induced the transformation of sepals to carpels and petals to stamens. However, there is little knowledge about the function of OsMADS58, which was a homologue of AGMAOUS in rice. In our study, OsMADS58 driven by the UBIQUITIN promoter was ectopiely expressed in Arabidopsis., and carpel-like sepals, incomplete petals and stamens instead of petals were found in different transgenie plants according to different OsMADS58 mRNA expression levels. The phenotype of transgenic plant was similar to the AGMAOUS overexpression plant, suggesting that OsMADS58 might play an important role in flower development like AGMAOUS and they keep conserved function during evolution.
