|Table of Contents|

Adaptive Evolution in the Photosensory Module of PHYP Gene in Gymnosperms and PHYB Gene in Angiosperm(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2012年14期
Page:
123-126
Research Field:
Publishing date:

Info

Title:
Adaptive Evolution in the Photosensory Module of PHYP Gene in Gymnosperms and PHYB Gene in Angiosperm
Author(s):
WANG Jing; LI Wan-chang
Life Science College of Henan Normal University，Xinxiang，Henan 453007
Keywords:
gymnosperm; angiosperm; PHYP; PHYB; adaptive evolution
PACS:
Q 941+.2
DOI:
-
Abstract:
Phytochromes，which are the best-characterized plant photosensors，receive and transmit signals generated by red and far-red light.They can regulate a wide range of developmental and physiological responses to changes in light intensity and spectral quality during plant development.The N-terminal of phytochrome is photosensory module，which is covalently attached to the bilin chromophore.The conservation of the photosensory module is one of the functional prerequisites for phytochrome photoconversion and signal transduction.PHYP is the gymnosperm orthologue of PHYB.Both of the genes belong to B-type gene.In order to identify lineages and sites under positive selection，the molecular evolution of 8 gymnosperm and 8 gymnosperm photosensory module sequences were assayed under the branch model，the site model and the branch-site model established by Yang et al in this study.The results showed that strong positive selective pressure tends to occur in the recent PHYP lineages of cogeneric species but absent in old lineages consisting of distantly related species；6 positively selected sites have been identified in PHYB photosensory module of angiosperms.

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Last Update: 2014-09-17