Rhododendron on Taibai Mountains

R. capitatum i RBGE, Paterson & Geng 92 96.0973G, Foto: H. Eiberg


R. clementinae ssp. aureodorsale JN. Foto: Hans Eiberg
Introduceret af Jens Nielsen: ARS 604/2004 (South Shaanxi 3000 m.)


R. concinnum in Sichuan, Kangding, Foto: H. Eiberg


R. purdomii #2, Foto: H. Eiberg 2009
Collected from Taibai Shan in China. ARS 461/1995 (from Xian Botanical Garden)

Photosynthetic Characteristics and Anatomical Structure of Five Species of Rhododendron in the Taibai Mountain
Author:CAO Xiao-juan(College of Horticulture,Northwest A&F University,Yangling,Shaanxi 712100,China;College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100 China)
LIU Jian-jun(College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100 China)YANG Mei(College of Horticulture,Northwest A&F University,Yangling,Shaanxi 712100,China;College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100 China)Journal
Title:ACTA BOTANICA BOREALI-OCCIDENTALIA SINICAIssue:Volume 29, Issue 12, 2009

We studied the photosynthetic characteristics and morphological and anatomical structure of five species of Rhododendron between 2 000 m and 3 700 m elevation in the Taibai Mountain.The results showed that:R.capitatum distributed in alpine shrub,has high light saturation point and light compensation point,high light adaptability and poor shade tolerance. R.taibaiense found in 3000-3400 m under Larix chinensis forest,has lower light saturation point and higher light compensation point,weak light adaptability and narrower ecological amplitude. R.clementinae subsp.aureodorsale, R.purdomii and R.concinnum distributed in the 2 000~3 200 m under Betula albo-sinensis and Betula utilis forest,was low light compensation point,strong shade-tolerant and wide ecological amplitude.In morphological structure,the ratio of palisade tissue and spongy tissue of five species of Rhododendron were much less than 1,they were shade-tolerant plant.Leaf epidermis of R.capitatum densely covered scales,with well-developed palisade tissue and aerenchyma;Palisade tissue of R.taibaiense arranged closely and developed well;lower leaf epidermis of R. clementinae subsp.aureodorsale was densely puberulous,with highest stoma density and loosely arranged spongy tissue;Lower leaf epidermis of R.concinnum densely covered scales;Palisade tissue of R.purdomii was as low as the ratio of palisade tissue and spongy tissue. The formation of these structures was the results of adaptation to habitat in long-term. Flora of China, R. capitatum
Flora of China, R. clementinae ssp. aureodorsale
Flora of China, R. concinnum
Flora of China, R. purdomii
Flora of China, R. taibaiense