The epiphytic Cactaceae Hylocereus setaceus (Salm-Dick ex DC.) ralf bauer seed germination is controlled by light and temperature

Brazilian Archives of Biology and Technology

Edson Simão¹  Fábio Socolowski¹  Massanori Takaki¹ 

[1] ,UNESP Departamento de Botânica Rio Claro São Paulo ,Brasil

关键词: Endangered cactus;    phytochrome;    seed germination;   

DOI  :  10.1590/S1516-89132007000400011

来源: SciELO

【 摘 要 】

The effect of light and temperature on seed germination in Hylocereus setaceus was analyzed by isothermic incubations under continuous white light and darkness. The minimum temperature for germination was between 5 to 10°C and the maximum between 45 to 50°C. The optimum temperaturewais between 25 and 30°C. The involvement of phytochrome, by very low fluence response, in controlled seed germination was attained by incubation in a gradient of photoequilibrium of phytochrome. The results indicated that seeds of H. setaceus germinated in a wide range of temperature, under canopy and in open areas, but in complete darkness they did not germinate.

【 授权许可】

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