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Chunshan Guo Wei Cui Xue Feng Jianzhou Zhao Guihua Lu Beijing Kaituo DNA Biotech Research Center Beijing China Pioneer Hi-Bred International Inc. a DuPont Company Johnston IA USA The Institute of Genetics Developmental Biology the Chinese Academy of Sciences Beijing China. 《Acta Botanica Sinica》2011,(3)
Sorghum (Sorghum bicolor) has high levels of starch,sugar,and fiber and is one of the most important energy crops in the world.Insect damage is one of the challenges that impacts sorghum biomass production.There are at least 150 insect species that can infest sorghum varieties worldwide.These insects can complete several generations within a growing season,they target various parts of sorghum plants at developmental stages,and they cause significant biomass losses.Genetic research has revealed the existence... 相似文献
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桃儿七光合生理特性的地理差异研究 总被引:7,自引:3,他引:4
对中国由南向北5个种源地桃儿七(Sinopodophyllum hexandrum)的光合生理生态特性进行了研究.结果表明:(1)北部宁夏六盘山地区植株的光饱和点(LSP)和光补偿点(LCP)最高,表观光量子效率(AQY)、瞬时光能利用效率(ILUE)和最大光合速率(Pmax)最低,光合能力最差;最南部云南纳帕海植株的LSP和LCP很低,但因其AQY和ILUE最高,故其Pmax最大,强光下的光合能力最高.(2)最南部云南纳帕海和最北部甘肃兴隆山个体的羧化效率(CE)最高,且CO2补偿点(CCP)较低,因此CO2利用率较高;而较南部四川刷经寺个体的CE最低,且CCP最高,故CO2利用效率最低.(3)各种源植株叶片的叶绿素总量及叶绿素a含量无显著差异,而不同地区个体的Chla/Chlb值差异显著,最北部甘肃兴隆山植株的Chla/Chlb值最大,而南部四川刷经寺的Chla/Chlb值最小.(4)各种源地植株的水分利用效率(WUE)和蒸腾速率(Tr)对光量子通量密度(PFD)与CO2浓度的响应过程也表现出显著的地理分异.总的来看,桃儿七是一种喜光但又较耐阴植物,但不同分布区桃儿七的光合生理生态特征已经出现了较显著的地理分化. 相似文献
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LÚCIA J. ROSADA CLAUDINÉIA C. S. FRANCO JULIANE R. SANT'ANNA EDILSON N. KANESHIMA MARIA CELESTE GONÇALVES‐VIDIGAL MARIALBA A. A. CASTRO‐PRADO 《The Journal of eukaryotic microbiology》2010,57(4):383-384
ABSTRACT. Heterokaryosis is the initial step of the parasexual cycle, a process that provides genetic variability in filamentous fungi through the production of heterozygous diploid nuclei. To characterize the parasexual cycle in Colletotrichum lindemuthianum, we evaluated the presence of heterokaryosis, vegetative compatibility reactions, and diploid formation among isolates of Race 65 collected from different Brazilian states. Vegetative compatibility groups were identified among the isolates according to their ability to form heterokaryons. Two heterozygous diploids were selected from compatible heterokaryons, which were characterized by the segregation of the parental auxotrophic markers and by RAPD profiles. 相似文献
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El Ouezzani S Janati IA Magoul R Pévet P Saboureau M 《Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology》2011,181(2):299-309
The jerboa (Jaculus orientalis) has been described in the past as a hibernator, but no reliable data exist on the daily and seasonal rhythmicity of body
temperature (T
b). In this study, T
b patterns were determined in different groups of jerboas (isolated males and females, castrated males and grouped animals)
maintained in captivity during autumn and winter, and submitted to natural variations of light and ambient temperature (T
a). T
b and T
a variations were recorded with surgically implanted iButton temperature loggers at 30-min intervals for two consecutive years.
About half (6/13) of isolated female jerboas hibernated with a T
b < 33°C, with hibernation bouts interspersed with short periods of normothermy from November to February. Hibernation bout
durations were longer (4–5 days) than those of normothermia phases (1–4 days). During hibernation, the minimum T
b was low (T
bmin ~10.7°C). In contrast, one of the 12 isolated males showed short hibernation bouts of ca. 2 days late in the hibernation
season, February–March. The males had T
bmin values of 15.1°C. In contrast to predictions, no castrated males hibernated. When jerboas were grouped, females and males
exhibited concomitant torpor bouts. In males, the longest bouts were observed during the late hibernation season. These data
suggest complex regulation of hibernation in jerboas. 相似文献
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Ramadan B Sopi Syed IA Zaidi Mitko Mladenov Hazbije Sahiti Zahide Istrefi Icko Gjorgoski Azem Laj?i Muharrem Jakupaj 《Respiratory research》2012,13(1):68