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排序方式: 共有1249条查询结果,搜索用时 312 毫秒
991.
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993.
The AGL6-like Gene CpAGL6, a Potential Regulator of Floral Time and Organ Identity in Wintersweet (Chimonanthus praecox) 总被引:1,自引:0,他引:1
Bei-Guo Wang Qiong Zhang Li-Gang Wang Ke Duan Ai-Hu Pan Xue-Ming Tang Shun-Zhao Sui Ming-Yang Li 《Journal of Plant Growth Regulation》2011,30(3):343-352
Wintersweet (Chimonanthus praecox), a deciduous aromatic shrub endemic to China, has high ornamental value for developing beautiful flowers with strong fragrance.
The transition from the vegetative to the reproductive phase in wintersweet takes 4-5 years. The molecular mechanism regulating
flower development in this basal angiosperm is largely unknown. Here we characterized the molecular features and expression
patterns of the C. praecox
AGL6-like gene CpAGL6 and investigated its potential role in regulating floral time and organ development via ectopic expression in Arabidopsis thaliana. The expression of CpAGL6 is highly tissue-specific, with the highest level in the middle tepals, moderate levels in inner tepals and carpels, and
weak levels in stamen and young leaf tissues. Its dynamic expression in the flower is coincident with tepal opening. Ectopic
expression of CpAGL6 in Arabidopsis retarded the vegetative growth and led to precocious flowering, mainly correlated with the inhibition of the floral repressor
FLC and promotion of the floral promoters AP1 and FT. Although no ectopic floral organs have been observed, transgenic plants exhibited abnormal stamen and carpel development
in later-developing flowers, with fertility reduced to varying degrees. These results suggest that CpAGL6, the AGL6-like gene from the basal angiosperm C. praecox, is a potential E-function regulator involved in specifying floral time and organ identity, functionally homologous to those
AGL6-like genes from higher eudicots and monocots. 相似文献
994.
Sui Sheng T. Hua Maria T. Brandl Bradley Hernlem Jeffrey G. Eng Siov Bouy L. Sarreal 《Mycopathologia》2011,171(2):133-138
The metabolic activity of the aflatoxigenic fungus, Aspergillus flavus co-cultured with the biocontrol yeast, Pichia anomala was examined using several viability stains. Both the FUN-1 stain and the combined use of DiBAC4(5) with CDFA-AM stains were applied in this study. The results suggest that the ATP-generating system in A. flavus was inactivated as the ratio of yeasts to fungi increased in the dual culture. A decrease in hyphal membrane potential and
esterase activity was substantiated by the combined stains of DiBAC4(5) and CDFA-AM. Reduced metabolic function in conjunction with cell wall damage of A. flavus hindered the growth and biomass production of this fungus. Viability stains such as FUN-1 and DiBAC4(5) with CDFA-AM may assist in elucidating the biocontrol mechanism by allowing for the visualization of the antagonistic
effect of yeast species on target fungi in situ, as well as for screening potent biocontrol yeast agents against fungal pathogens. 相似文献
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996.
Zhang X Hufnagel H Markotan T Lanter J Cai C Hou C Singer M Opas E McKenney S Crysler C Johnson D Sui Z 《Bioorganic & medicinal chemistry letters》2011,21(18):5577-5582
A series of 4-azetidinyl-1-aryl-cyclohexanes as potent CCR2 antagonists with high selectivity over activity for the hERG potassium channel is discovered through divergent SARs of CCR2 and hERG. 相似文献
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998.
999.
交替隔沟灌溉与施氮量对日光温室黄瓜光合作用、生长及产量的影响 总被引:6,自引:0,他引:6
以黄瓜“津育5号”为试材,研究了交替隔沟灌溉和施氮量(零氮肥、优化氮肥和常规氮肥)对日光温室黄瓜(冬春茬、秋冬茬)光合作用、生长特性、产量形成和果实品质的影响.结果表明:交替隔沟灌溉下,植株上、中、下叶位叶片的净光合速率(Pn)略低于常规灌溉下的相应叶位,而蒸腾速率(Tr)显著降低,上、中叶位叶片的瞬时水分利用效率(WUE)有所提高;交替隔沟灌溉下植株光合作用的限制因素是气孔因素.交替隔沟灌溉下施氮量的增加有助于促进黄瓜功能叶片Pn和WUE的提高.与常规灌溉相比,交替隔沟灌溉下叶片叶绿素含量和植株总生物产量有所降低,但根生物产量、根冠比以及根和果实器官的干物质分配比例增加,经济产量持平,经济产量水平的水分利用效率( WUEy)显著提高.交替隔沟灌溉有利于植株根系发育和果实形成.交替隔沟灌溉下随施氮量的增加,叶片叶绿素含量、叶绿素a/b、比叶重、植株总生物产量和经济产量呈增加趋势,果实Vc含量和可溶性糖含量升高,但优化氮肥与常规氮肥处理间差异不显著,氮肥施用对WUEy无显著影响.冬春茬黄瓜的经济产量和生物产量显著高于秋冬茬. 相似文献
1000.
Wang X Chen W Huang Y Sun J Men J Liu H Luo F Guo L Lv X Deng C Zhou C Fan Y Li X Huang L Hu Y Liang C Hu X Xu J Yu X 《Genome biology》2011,12(10):R107-14