Sex-specific responses of Populus deltoides to defoliation

doi:10.5586/asbp.3566

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Sex-specific responses of Populus deltoides to defoliation
	Li Shuxin 1,2; Yu Lei1,2 ; Duan Baoli1 ; Peng Shuming 1,3
刊名	ACTA SOCIETATIS BOTANICORUM POLONIAE
	2017
卷号	86 期号:4 页码:12
关键词	artificial defoliation Populus deltoides nonstructural carbohydrates net photosynthetic rate sexual differences
ISSN号	0001-6977
DOI	10.5586/asbp.3566
英文摘要	There has been an increasing interest in understanding the differential effects of sexual dimorphism on plant stress responses. However, there is no clear pattern in the responses of the sexes to defoliation. In this study, the effects of different severity of artificial defoliation on biomass production, total nonstructural carbohydrate (NSC) concentration, and photosynthetic rate (P-N) of male and female Populus deltoides were examined. We used half and full defoliation to observe the differences between the sexes in three harvest dates (1 week, 4 weeks, and 8 weeks after treatments). We hypothesized that female and male P. deltoides compared with an undefoliated control would have compensatory growth in response to defoliation treatments. Results showed that half and full defoliation reduced the growth of both sexes. Following half defoliation, root growth was reduced, especially in males, at T2 (4 weeks after defoliation) and T3 (8 weeks after defoliation), while males showed an increase in height increment under the half defoliation compared with the nondefoliation treatments. By contrast, females were more negatively affected by defoliation than males in terms of biomass after 8 weeks. One week after defoliation, PN increased significantly in females and males under half defoliation (+30%, +32%, respectively) and full defoliation (+58%, +56%, respectively). However, 8 weeks after defoliation, there was little difference in PN between defoliated and undefoliated female cuttings. Increases in stomatal conductance (g(s)) and leaf nitrogen were observed under fully defoliated female and male cuttings. Moreover, males had less NSC concentrations following half defoliation compared with females. Our results indicate that leaf compensatory growth in male cuttings of P. deltoides was maintained by obtaining greater photosynthetic capacity, higher leaf nitrogen, and lower NSC concentration following half and full defoliation. Our results highlight that females suffered from greater negative effects than did males following half defoliation, but under full defoliation, the differences between both sexes were subtle.
语种	英语
出版者	POLSKIE TOWARZYSTWO BOTANICZNE
WOS记录号	WOS:000422837600006
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/20861]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者	Peng Shuming
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Chengdu Univ Technol, Sch Environm, Chengdu 610059, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Li Shuxin,Yu Lei,Duan Baoli,et al. Sex-specific responses of Populus deltoides to defoliation[J]. ACTA SOCIETATIS BOTANICORUM POLONIAE,2017,86(4):12.
APA	Li Shuxin,Yu Lei,Duan Baoli,&Peng Shuming.(2017).Sex-specific responses of Populus deltoides to defoliation.ACTA SOCIETATIS BOTANICORUM POLONIAE,86(4),12.
MLA	Li Shuxin,et al."Sex-specific responses of Populus deltoides to defoliation".ACTA SOCIETATIS BOTANICORUM POLONIAE 86.4(2017):12.