期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 51, 期 347, 页码 971-983出版社
OXFORD UNIV PRESS
DOI: 10.1093/jexbot/51.347.971
关键词
embryogenesis; polarity; intercellular signalling; auxin; cell wall components; Arabidopsis thaliana
The establishment of the apical-basal axis is a critical event in plant embryogenesis, evident from the earliest stages onwards. Polarity is evident in the embryo sac, egg cell, zygote, and embryo-suspensor complex. In the embryo-proper, two functionally distinct meristems form at each pole, through the localized expression of key genes. A number of mutants, notably of the model genetic organism Arabidopsis thaliana, have revealed new gene functions that are required for patterning of the apical-basal axis. There is now increasing evidence that two particular modes of signalling, via auxin acid cell wall components, play important roles in co-ordinating the gene expression programmes that define determinative roles in the establishment of polarity.
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