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| | [這篇文章最後由csyin在 2006/01/11 02:13pm 第 1 次編輯]
title
An S-like ribonuclease gene is used to generate a trap-leaf enzyme in the carnivorous plant Drosera adelae.
abstract
Carnivorous plants usually grow in nutrient-deficient habitats, and thus they partly depend on insects for nitrogen and phosphate needed for amino acid and nucleotide synthesis. We report that a sticky digestive liquid from a sundew, Drosera adelae, contains an abundant amount of an S-like ribonuclease (RNase) that shows high amino acid-sequence similarity to S-like RNases induced by phosphate starvation or wounding in normal plants. By giving leaves an RNase "coat", D. adelae seems to achieve two requirements simultaneously to adapt itself to its specific surroundings: it obtains phosphates from insects, and defends itself against pathogen attack.
source
Okabe T, Yoshimoto I, Hitoshi M, Ogawa T, Ohyama T.
FEBS Lett. 2005, 579: 5729-5733
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16225872&query_hl=3&itool=pubmed_docsum
標題
食蟲植物D. adelae的一種S-like ribonuclease基因是用於製造捕蟲葉酵素
摘要
食蟲植物通常生長在養份缺乏的環境，因而它們在一定程度上要依賴昆蟲所提供的氮和磷來作為氨基酸和核甘酸合成之用。我們在此報告毛氈苔D. adelae的黏性消化液中大量含有一種的S-like ribonuclease，其與一般植物在缺磷或受傷時所產生的S-like ribonuclease在氨基酸序列上具有高度相似性。經由RNase在葉子上的「披覆」，D. adelase似乎同時得到兩種好處來適應它們所生存的獨特環境：它們可以從昆蟲上獲得磷，並可保護它們對抗病原的傷害。
註：Ribonuclease (RNase)可分解RNA。
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 2006/01/11 02:02pm  IP: 已設定保密 | [本文共 1681 位元組]  |
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