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The effects of intervessel pit characteristics on xylem hydraulic efficiency and photosynthesis in hemiepiphytic and non-hemiepiphytic Ficus species
Li, Shuai; Hao, GuangYou2; Niinemets, Ulo; Harley, Peter C.; Wanke, Stefan3; Lens, Frederic4; Zhang, Yong-Jiang; Cao, Kun-Fang
2019
Source PublicationPHYSIOLOGIA PLANTARUM
ISSN0031-9317
Volume167Issue:4Pages:661-675
Abstract

Xylem vulnerability to cavitation and hydraulic efficiency are directly linked to fine-scale bordered pit features in water-conducting cells of vascular plants. However, it is unclear how pit characteristics influence water transport and carbon economy in tropical species. The primary aim of this study was to evaluate functional implications of changes in pit characteristics for water relations and photosynthetic traits in tropical Ficus species with different growth forms (i.e. hemiepiphytic and non-hemiepiphytic) grown under common conditions. Intervessel pit characteristics were measured using scanning electron microscopy in five hemiepiphytic and five non-hemiepiphytic Ficus species to determine whether these traits were related to hydraulics, leaf photosynthesis, stomatal conductance and wood density. Ficus species varied greatly in intervessel pit structure, hydraulic conductivity and leaf physiology, and clear differences were observed between the two growth forms. The area and diameter of pit aperture were negatively correlated with sapwood-specific hydraulic conductivity, mass-based net assimilation rate, stomatal conductance (g(s)), intercellular CO2 concentration (C-i) and the petiole vessel lumen diameters (D-v), but positively correlated with wood density. Pit morphology was only negatively correlated with sapwood- and leaf-specific hydraulic conductivity and D-v. Pit density was positively correlated with g(s), C-i and D-v, but negatively with intrinsic leaf water-use efficiency. Pit and pit aperture shape were not significantly correlated with any of the physiological traits. These findings indicate a significant role of pit characteristics in xylem water transport, carbon assimilation and ecophysiological adaptation of Ficus species in tropical rain forests.

Subject AreaPlant Sciences
DOI10.1111/ppl.12923
Indexed BySCI
Language英语
WOS IDWOS:000498247100015
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/11597
Collection植物生理生态研究组
Affiliation1.[Li, Shuai; Niinemets, Ulo; Harley, Peter C.] Estonian Univ Life Sci, Inst Agr & Environm Sci, Dept Plant Physiol, EE-51014 Tartu, Estonia
2.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Mengla 666303, Yunnan, Peoples R China
3.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang 110016, Liaoning, Peoples R China
4.Tech Univ Dresden, Inst Bot, D-01062 Dresden, Germany
5.Leiden Univ, Naturalis Biodivers Ctr, POB 9517, NL-2300 RA Leiden, Netherlands
6.Univ Maine, Sch Biol & Ecol, Orono, ME 04469 USA
7.Guangxi Univ, Coll Forestry, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530004, Guangxi, Peoples R China
Recommended Citation
GB/T 7714
Li, Shuai,Hao, GuangYou,Niinemets, Ulo,et al. The effects of intervessel pit characteristics on xylem hydraulic efficiency and photosynthesis in hemiepiphytic and non-hemiepiphytic Ficus species[J]. PHYSIOLOGIA PLANTARUM,2019,167(4):661-675.
APA Li, Shuai.,Hao, GuangYou.,Niinemets, Ulo.,Harley, Peter C..,Wanke, Stefan.,...&Cao, Kun-Fang.(2019).The effects of intervessel pit characteristics on xylem hydraulic efficiency and photosynthesis in hemiepiphytic and non-hemiepiphytic Ficus species.PHYSIOLOGIA PLANTARUM,167(4),661-675.
MLA Li, Shuai,et al."The effects of intervessel pit characteristics on xylem hydraulic efficiency and photosynthesis in hemiepiphytic and non-hemiepiphytic Ficus species".PHYSIOLOGIA PLANTARUM 167.4(2019):661-675.
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