Touch‐ and Methyl Jasmonate‐induced Lignification in Tendrils ofBryonia dioicaJacq.
作者:
Isolde Kaiser,
J. Engelberth,
Beate Groth,
E. W. Weiler,
期刊:
Botanica Acta
(WILEY Available online 1994)
卷期:
Volume 107,
issue 1
页码: 24-29
ISSN:0932-8629
年代: 1994
DOI:10.1111/j.1438-8677.1994.tb00404.x
出版商: Blackwell Publishing Ltd
关键词: Bryonia dioica;methyl jasmonate;touch;lignification (induced);phenylalanine ammonia‐lyase;aminoindanphosphonic acid
数据来源: WILEY
摘要:
AbstractThe touch‐induced free coiling response ofBryonia dioicatendrils is accompanied by the differentiation of supporting tissue at the ventral side of the organ, becoming the inner (concave) side of the coiled tendril. As part of this process, the Bianconi plate, a continuous sclerenchyma sheath stretching along the ventral face of the five bicollateral vascular bundles, becomes strongly lignified. During this reaction, the extractable activity of phenylalanine ammonia‐lyase in the tendrils increases four‐ to five‐fold, while the amount of PAL, as demonstrated by immunoblotting, remains unchanged. This touch‐induced process can also be elicited by airborne application of methyl jasmonate. The PAL inhibitor, 2‐aminoindan‐2‐phosphonic acid (AIP) completely inhibits both the touch‐ and methyl jasmonate‐induced deposition of lignin‐like material in the Bianconi plate, but has no effect on coiling. From these results, it can be concluded that the cessation of growth at the ventral side of a free‐coiling tendril is not due to induced lignification but rather, lignification seems to serve the function of increasing the mechanical strengt
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