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Contrasting responses in the growth and energy utilization properties of sympatric Populus and Salix to different altitudes: implications for sexual dimorphism in Salicaceae
Lei, Yanbao1,2; Chen, Ke3; Jiang, Hao1; Yu, Lei1; Duan, Baoli1
Corresponding AuthorBaoli Duan
2017
Source PublicationPHYSIOLOGIA PLANTARUM
ISSN0031-9317
EISSN1399-3054
Volume159Issue:1Pages:30-41
SubtypeArticle
AbstractAn interesting ecological and evolutionary puzzle arises from the observations of male-biased sex ratios in genus Populus, whereas in the taxonomically related Salix, females are generally more dominant. In the present study, we combined results from a field investigation into the sex ratios of the Salicaceous species along an altitudinal gradient on Gongga Mountain, and a pot experiment by monitoring growth and energy utilization properties to elucidate the mechanisms governing sexual dimorphism. At middle altitudes 2000 and 2300m, the sex ratios were consistent with a 1:1 equilibrium in sympatric Populus purdomii and Salix magnifica. However, at the lower and higher ends of the altitudinal gradient, skewed sex ratios were observed. For example, the male:female ratios were 1.33 and 2.36 in P. purdomii at 1700 and 2600m respectively; for S. magnifica the ratio was 0.62 at 2600m. At 2300m, the pot-grown seedlings of both species exhibited the highest biomass accumulation and total leaf area, simultaneously with the balanced sex ratios in the field. At 3300m, the specific leaf area in male P. purdomii was 23.9% higher than that of females, which may be the morphological cause for the observed 19.3% higher nitrogen allocation to Rubisco, and 20.6% lower allocation to cell walls. As such, male P. purdomii showed a 32.9% higher foliar photosynthetic capacity, concomitant with a 12.0% lower construction cost. These properties resulted in higher photosynthetic nitrogen- and energy-use efficiencies, and shorter payback time (24.4 vs 40.1days), the time span that a leaf must photosynthesize to amortize the carbon investment. Our results thus suggested that male P. purdomii evolved a quicker energy-return strategy. Consequently, these superior energy gain-cost related traits and the higher total leaf area contributed to the higher growth rate and tolerance in stress-prone environments, which might, in part, shed new light on the male-biased sex ratios in Populus. However, no significant sexual difference was observed in S. magnifica for all the above parameters, thereby implying that the female-biased sex ratios in Salix cannot be explained in terms of the energy-use properties studied here.
KeywordConstruction Cost Chemical-composition Physiological-responses Water Availability Plant-populations Flowering Plants Dioecious Plants Ratio Variation Payback Time Acer-negundo
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1111/ppl.12479
WOS Subject ExtendedPlant Sciences
Indexed BySCI
WOS KeywordCONSTRUCTION COST ; CHEMICAL-COMPOSITION ; PHYSIOLOGICAL-RESPONSES ; WATER AVAILABILITY ; PLANT-POPULATIONS ; FLOWERING PLANTS ; DIOECIOUS PLANTS ; RATIO VARIATION ; PAYBACK TIME ; ACER-NEGUNDO
Language英语
Quartile2区
TOP
WOS SubjectPlant Sciences
WOS IDWOS:000390650500003
Funding OrganizationNational Science Foundation of China(31370607 ; Chinese Academy of Sciences(SDSQB-2012-02 ; 31300512 ; SDS0-135-1207) ; 31570598)
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18336
Collection山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
2.Tokyo Univ Agr & Technol, Dept Environm Sci Biosphere, Fuchu, Tokyo 1838509, Japan
3.Southwest Univ Sci & Technol, Sch Life Sci & Engn, Mianyang 621010, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
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GB/T 7714
Lei, Yanbao,Chen, Ke,Jiang, Hao,et al. Contrasting responses in the growth and energy utilization properties of sympatric Populus and Salix to different altitudes: implications for sexual dimorphism in Salicaceae[J]. PHYSIOLOGIA PLANTARUM,2017,159(1):30-41.
APA Lei, Yanbao,Chen, Ke,Jiang, Hao,Yu, Lei,&Duan, Baoli.(2017).Contrasting responses in the growth and energy utilization properties of sympatric Populus and Salix to different altitudes: implications for sexual dimorphism in Salicaceae.PHYSIOLOGIA PLANTARUM,159(1),30-41.
MLA Lei, Yanbao,et al."Contrasting responses in the growth and energy utilization properties of sympatric Populus and Salix to different altitudes: implications for sexual dimorphism in Salicaceae".PHYSIOLOGIA PLANTARUM 159.1(2017):30-41.
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