Vegetative anatomy and photosynthetic performance of the only known winter-green Cypripedium species: implications for divergent and convergent evolution of slipper orchids

doi:10.1093/botlinnean/boab033

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	Vegetative anatomy and photosynthetic performance of the only known winter-green Cypripedium species: implications for divergent and convergent evolution of slipper orchids
	Zhang,Wei ; Feng,Jing-Qiu ; Kong,Ji-Jun ; Sun,Lu ; Fan,Ze-Xin ; Jiang,Hong ; Zhang,Shi-Bao
	2021
Source Publication	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN	0024-4074
Volume	197 Issue:4 Pages:527-540
Abstract	Cypripedium subtropicum is the only known winter-green species in the genus Cypripedium, whereas the other nearly 50 species keep their leaves for less than half the year. Life form has an important effect on carbon acquisition and adaptation of plants. However, the physiological mechanism behind it remains unclear. In this study, we investigated vegetative anatomy and photosynthetic performance of C. subtropicum across with its leaf ages. These anatomical and photosynthetic traits were also compared with typical Cypripedium spp. and other members of subfamily Cypripedioideae. The obtained results confirmed that this species exhibited many characters of shade plants, such as thin leaves, extremely low photosynthetic rate and light saturation point and high chlorophyll content. Unlike the strategy adopted by typical Cypripedium spp. that quickly achieve annual carbon gain with a high assimilation rate in a short growing season, C. subtropicum obtains its carbon through a low assimilation rate but a much longer leaf lifespan. The local climate and favourable light condition guaranteed the comparable carbon income in winter to compensate for its low photosynthetic capacity. The long-lived, thin leaves of C. subtropicum, differing from the long-lived, thick leathery leaves in conduplicate-leaved genera, represent a distinct adaptive strategy in subfamily Cypripedioideae. Our findings shed light on the divergent and convergent evolution in slipper orchids, and we hope these findings will contribute to the conservation of such an endangered orchid.
Keyword	Cypripedioideae Cypripedium subtropicum endangered plant habit shift leaf trait Paphiopedilum physiological diversity photosynthetic acclimation DECIDUOUS LEAVES LEAF ANATOMY ACCLIMATION PAPHIOPEDILUM POPULATIONS IRRADIANCE RESPONSES CHLOROPLAST MANAGEMENT CALCEOLUS
DOI	10.1093/botlinnean/boab033
WOS ID	WOS:000741345300005
Citation statistics
Document Type	期刊论文
Identifier	http://ir.kib.ac.cn/handle/151853/73066
Collection	中国科学院昆明植物研究所
Affiliation	1.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol, Mengla 666303, Yunan, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming 650201, Yunnan, Peoples R China 3.Yunnan Acad Forestry & Grassland, Natl Forestry & Grassland Adm, Yunnan Lab Conservat Rare Endangered & Endem Fore, Kunming 650204, Yunnan, Peoples R China 4.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China
Recommended Citation GB/T 7714	Zhang,Wei,Feng,Jing-Qiu,Kong,Ji-Jun,et al. Vegetative anatomy and photosynthetic performance of the only known winter-green Cypripedium species: implications for divergent and convergent evolution of slipper orchids[J]. BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,2021,197(4):527-540.
APA	Zhang,Wei.,Feng,Jing-Qiu.,Kong,Ji-Jun.,Sun,Lu.,Fan,Ze-Xin.,...&Zhang,Shi-Bao.(2021).Vegetative anatomy and photosynthetic performance of the only known winter-green Cypripedium species: implications for divergent and convergent evolution of slipper orchids.BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,197(4),527-540.
MLA	Zhang,Wei,et al."Vegetative anatomy and photosynthetic performance of the only known winter-green Cypripedium species: implications for divergent and convergent evolution of slipper orchids".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 197.4(2021):527-540.

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