濒危植物明党参和非濒危种峨参气体交换对土壤水分的响应

【作者】 常杰； 葛滢； 李伟成； 盛海燕； 殷现伟； 樊梅英；

【机构】 浙江大学生命科学学院；

【摘要】 <正> The effect of soil moisture on gas exchange and growth of an endangered species, Changium smyrnioides, was compared with a non-endangered species, Anthriscus sylvestris. Two species belong to the same family Umbellaceae. With the decrease of soil moisture, the diurnal mean net photosynthetic rate (PN) and transpiration rate (E) decreased, while water use efficiency (WUE) increased. PN and WUE of C. smyrnioides were lower than those of A. sylvestris, whereas E was higher than that of A. sylvestris. The biomass, leaf mass ratio (LMR) and leaf area ratio (LAR) of C. smyrnioides were lower than those of A. sylvestris. Under drought, biomass, LMR and LAR of C. smyrnioides decreased greater than those of A. sylvestris, and specific root length (SRL) appeared opposite trend, indicating that C. smyrnioides accumulates less biomass, and allocates more mass to underground parts.更多还原

【Abstract】 The effect of soil moisture on gas exchange and growth of an endangered species, Changium smyrnioides, was compared with a non-endangered species, Anthriscus sylvestris. Two species belong to the same family Umbellaceae. With the decrease of soil moisture, the diurnal mean net photosynthetic rate (PN) and transpiration rate (E) decreased, while water use efficiency (WUE) increased. PN and WUE of C. smyrnioides were lower than those of A. sylvestris, whereas E was higher than that of A. sylvestris. The biomass, leaf mass ratio (LMR) and leaf area ratio (LAR) of C. smyrnioides were lower than those of A. sylvestris. Under drought, biomass, LMR and LAR of C. smyrnioides decreased greater than those of A. sylvestris, and specific root length (SRL) appeared opposite trend, indicating that C. smyrnioides accumulates less biomass, and allocates more mass to underground parts.更多还原