The influence of light intensity on anatomical structure and pigment contents of Tradescantia pallida (Rose) Hunt. cv. purpurea Boom (Commelinaceae) leaves

Brazilian Archives of Biology and Technology

Élder Antonio Sousa Paiva¹  Rosy Mary Dos Santos Isaias¹  Fernando Henrique Aguiar Vale¹  Cristina Generosa De Senna Queiroz¹ 

[1] ,Universidade Federal de Minas Gerais Instituto de Ciências Biológicas Departamento de BotânicaBelo Horizonte MG ,Brazil

关键词: Leaf anatomy;    light intensity;    chlorophyll;    carotenoids;    anthocyanin;    Tradescantia;   

DOI  :  10.1590/S1516-89132003000400017

来源: SciELO

【 摘 要 】

The aim of this work was to study the effects of five different light intensities on the anatomical structure and on the pigment contents in leaves of Tradescantia pallida cv. purpurea. Once light intensity became lower, the thickness of leaf lamina and mesophyll were reduced. Adjustments in light-harvesting antenna size were observed: an increase in chlorophyll a + b/carotenoids ratio at low-light growth conditions. There was a strong positive linear correlation between the light intensity values and anthocyanin contents. Hence, T. pallida cv. purpurea acclimation to distinct environmental conditions might be related to its capacity of altering structurally and physiologically its phenotype.

【 授权许可】

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