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131.
Species loss and aboveground carbon storage in a tropical forest 总被引:1,自引:0,他引:1
Bunker DE Declerck F Bradford JC Colwell RK Perfecto I Phillips OL Sankaran M Naeem S 《Science (New York, N.Y.)》2005,310(5750):1029-1031
Tropical forest biodiversity is declining, but the resulting effects on key ecosystem services, such as carbon storage and sequestration, remain unknown. We assessed the influence of the loss of tropical tree species on carbon storage by simulating 18 possible extinction scenarios within a well-studied 50-hectare tropical forest plot in Panama, which contains 227 tree species. Among extinction scenarios, aboveground carbon stocks varied by more than 600%, and biological insurance varied by more than 400%. These results indicate that future carbon storage in tropical forests will be influenced strongly by future species composition. 相似文献
132.
Mukhtar MS Carvunis AR Dreze M Epple P Steinbrenner J Moore J Tasan M Galli M Hao T Nishimura MT Pevzner SJ Donovan SE Ghamsari L Santhanam B Romero V Poulin MM Gebreab F Gutierrez BJ Tam S Monachello D Boxem M Harbort CJ McDonald N Gai L Chen H He Y;European Union Effectoromics Consortium Vandenhaute J Roth FP Hill DE Ecker JR Vidal M Beynon J Braun P Dangl JL 《Science (New York, N.Y.)》2011,333(6042):596-601
Plants generate effective responses to infection by recognizing both conserved and variable pathogen-encoded molecules. Pathogens deploy virulence effector proteins into host cells, where they interact physically with host proteins to modulate defense. We generated an interaction network of plant-pathogen effectors from two pathogens spanning the eukaryote-eubacteria divergence, three classes of Arabidopsis immune system proteins, and ~8000 other Arabidopsis proteins. We noted convergence of effectors onto highly interconnected host proteins and indirect, rather than direct, connections between effectors and plant immune receptors. We demonstrated plant immune system functions for 15 of 17 tested host proteins that interact with effectors from both pathogens. Thus, pathogens from different kingdoms deploy independently evolved virulence proteins that interact with a limited set of highly connected cellular hubs to facilitate their diverse life-cycle strategies. 相似文献
133.
134.
Muhammad Ashraf Sher Muhammad Shahzad Muhammad Imtiaz Muhammad Shahid Rizwan 《Journal of plant nutrition》2018,41(8):1065-1081
Nitrogen (N) metabolism is of great economic importance because it provides proteins and nucleic acids which in turn control many cellular activities in plants. Salinity affects different steps of N metabolism including N uptake, NO3? reduction, and NH4+ assimilation, leading to a severe decline in crop yield. Major mechanisms of salinity effects on N metabolism are salinity-induced reductions in water availability and absorption, disruption of root membrane integrity, an inhibition of NO3? uptake by Cl?, low NO3? loading into root xylem, alteration in the activities of N assimilating enzymes, decrease in transpiration, and reduction in relative growth rate which results in a lower N demand. However, the effects of salinity on N metabolism are multifaceted and may vary depending on many plant and soil factors. The present review deals with salinity effects on N metabolism in plants, emphasizing on the activities of N metabolizing enzymes in a saline environment. 相似文献