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1. Environmental and spatial effects on the Qinghai-Tibet plateau plant community species composition | |||
Jia Peng,Jia Peng,Ma Yanqi,Du Guozhen | |||
Biology 08 November 2018 | |||
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Abstract:Community structure is the focus of community ecology. Comparing the relative contribution of environmental and spatial variables on species composition is essential to understand the process of community assembly. In this study, we explored that the effects of regional spatial scale, local spatial scale and environmental variables on the species composition of meadow and steppe on the Qinghai-Tibet plateau. The results showed that environmental, regional and local spatial scale variables had significant effects on meadows and their functional groups, and the explanation of local spatial variables was relatively high. And the regional spatial scale variable had a significant effect on the species composition of the steppes and their functional groups. In addition, the total explanation of environmental and spatial variables accounted the highest for the legume groups species composition at the sample sites. And the sum of the explanation of impact factors on meadow functional groups was not equal to the effect on meadow species composition, and the same phenomenon in the steppe. The results demonstrated that environmental and spatial variables and the division of functional groups could fully detect and explain the species composition of community on the Qinghai-Tibetan Plateau. | |||
TO cite this article:Jia Peng,Jia Peng,Ma Yanqi, et al. Environmental and spatial effects on the Qinghai-Tibet plateau plant community species composition[OL].[ 8 November 2018] http://en.paper.edu.cn/en_releasepaper/content/4746329 |
2. Isolation and expression analyses for a novel MAPK-like gene involved in developing caryopses in rice plant | |||
Xing Chen,Zhou Ye,Tiegang Zhang ,Xingsheng Wang,Xiaojin Zhou,Wei Cheng,Yingdian Wang | |||
Biology 24 April 2008 | |||
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Abstract:The proliferation rate of endosperm cell in the primary and secondary spikelet of rice was measured, during 0-6 day after heading, proliferation of endosperm cells in the primary spikelet was obviously faster than that in the secondary spikelet. Using differential display to visualize and isolate cDNA fragments related to endosperm development in the early stage, 4 cDNA fragments were chosen and proved through reverse Northern. They represented cellulose synthase-like protein OsCslE2 gene, enoyl CoA hydratase-like protein gene, a new protein kinase gene and a new unknown gene respectively. The full-length cDNA of the new protein kinase gene was obtained through reverse transcription PCR, which is 1591bp and encodes a 394 amino acid polypeptide (designated OsMAPK-like). This polypeptide has typical protein kinase domain, and is significantly homologous with MAPK, Analysis of OsMAPK-like expression had shown that in the primary spikelets OsMAPK-like mRNA began accumulated at 3rd day after heading, while at 6th-9th day after heading in the secondary spikelets. OsMAPK-like was also expressed in roots, shoots and leaves, and high relative amount was detected in the young leaves than in the mature leaves. The differential expression of OsMAPK-like suggests that it is related with cell proliferation of spikelets and leaves. | |||
TO cite this article:Xing Chen,Zhou Ye,Tiegang Zhang , et al. Isolation and expression analyses for a novel MAPK-like gene involved in developing caryopses in rice plant[OL].[24 April 2008] http://en.paper.edu.cn/en_releasepaper/content/20826 |
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