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From the floret to the canopy:High temperature tolerance during flowering

Plant Communications 2023年第6期4卷 22-41页

作者： Mayang Liu Yuhan Zhou Jiaxin Sun Fen Mao Qian Yao Baole Li Yuanyuan Wang Yingbo Gao Xin Dong Shuhua Liao Pu Wang Shoubing Huang College of Agronomy and Biotechnology China Agricultural UniversityBeijingChina College of Agronomy South China Agricultural UniversityGuangdongChina Shandong Academy of Agricultural Sciences JinanChina Chongqing Academy of Agricultural Sciences ChongqingChina

Heat waves induced by climate warming have become common in food-producing regions worldwide,frequently coinciding with high temperature(HT)-sensitive stages of many crops and thus threatening global food *** the HT sensitivity of reproductive organs is currently of great interest for increasing seed *** responses of seed set to HT involve multiple processes in both male and female reproductive organs,but we currently lack an integrated and systematic summary of these responses for the world’s three leading food crops(rice,wheat,and maize).In the present work,we define the critical high temperature thresholds for seed set in rice(37.2℃±0.2℃),wheat(27.3℃±0.5℃),and maize(37.9℃±0.4℃)during *** assess the HT sensitivity of these three cereals from the microspore stage to the lag period,including effects of HT on flowering dynamics,floret growth and development,pollination,and *** review synthesizes existing knowledge about the effects of HT stress on spikelet opening,anther dehiscence,pollen shedding number,pollen viability,pistil and stigma function,pollen germination on the stigma,and pollen tube ***-induced spikelet closure and arrest of pollen tube elongation have a catastrophic effect on pollination and fertilization in *** benefits from pollination under HT stress owing to bottom anther dehiscence and *** and secondary spikelet opening increase the probability of pollination success in wheat under HT ***,cereal crops themselves also have protective measures under HT *** canopy/tissue temperatures compared with air temperatures indicate that cereal crops,especially rice,can partly protect themselves from heat *** maize,husk leaves reduce inner ear temperature by about 5℃compared with outer ear temperature,thereby protecting the later phases of pollen tube growth and fertilization *** findings have important implications for accurate modeling,opt

关键词： high temperature seed set floret organs flowering pattern pollination

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Simultaneous flowering of umbrella bamboo (Fargesia murieliae) at its native home in Central China

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Journal of Forestry Research 2006年第4期17卷 293-297页

作者： LI Zhao-hua Manfred DENICH Thomas BORSCH School of Resources and Environmental Science Hubei University Wuhan 430062 P. R. China Center for Development Research University of Bonn D-53113 Bonn Germany Institute of Botany University of Bonn D-53115 Bonn Germany

flowering pattern and seedling establishment of umbrella bamboo （Fargesia murieliae （Gamble） Yi） were studied in its native habitat, Mount Shennongjia in Central China. Here in 1996-2000, over 95% of the bamboo plants simultaneously flowered and died, extending from lower elevations to the higher mountains along the altitude and from southwest to northeast along the mountain settings. Bamboo seedlings emerged after the simultaneous flowering, achieving an average density of 5 460 seedlings·m^-2 in the autumn of the year following the flowering. After a high mortality throughout the first winter, bamboo seedlings remained a stable density in following 2-4 years （1130-1230 seedlings·m^-2）. Seedling density positively related to the coverage of parent bamboo, but negatively to the herb layers.

关键词： Altitudinal scale bamboo sites flowering pattern seedling establishment Shennongjia.

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