RESPONSES OF BARLEY AND WHEAT TO PATHOGENS, NON-PATHOGENS AND WOUNDING AS INDICATED BY INDUCED PHENYLALANINE AMMONIA-LYASE ACTIVITY

IF 1.7 4区 农林科学 Q2 AGRONOMY Acta Agriculturae Scandinavica Section B-Soil and Plant Science Pub Date : 1998-09-01 DOI:10.1080/09064719809362497
S. Peltonen
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引用次数: 11

Abstract

Phenylalanine ammonia‐lyase (PAL) activity was strongly induced in barley and wheat leaves after inoculation with highly or weakly aggressive isolates of Bipolaris sorokiniana. Aggressive isolates, however, generated much stronger early induction of PAL than less aggressive isolates. The non‐pathogens Drechslerei teres (in wheat), Stagonospora nodorum (in barley), Botrytis cinerea, Trichoderma reesei and the root and stem pathogen Fusarium culmorum caused no clear induction of PAL on intact barley or wheat leaves. They were able to induce PAL at the wound margins of barley leaves, although at a lower level than B. sorokiniana. Wounding alone did not induce PAL. Prior inoculation of barley leaves with non‐pathogens provided partial protection against a subsequent challenge with B. sorokiniana seven days later. Induced plants showed unchanged PAL activity levels compared to non‐induced plants after challenge inoculation. The results suggest that PAL plays a role in the active defences of barley and wheat in...
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用诱导苯丙氨酸解氨酶活性研究大麦和小麦对病原菌、非病原菌和伤害的反应
在大麦和小麦叶片中接种高或弱侵袭性双极星孢分离株后,苯丙氨酸解氨酶(PAL)活性被强烈诱导。然而,侵袭性分离株比侵袭性较弱的分离株产生更强的PAL早期诱导。非病原菌圆茎霉(Drechslerei teres,小麦)、棒状Stagonospora nodorum(大麦)、灰霉病菌(Botrytis cinerea)、里氏木霉(Trichoderma reesei)和根茎病原菌镰刀菌(Fusarium culmorum)对大麦和小麦完整叶片的PAL诱导作用不明显。他们能够在大麦叶片的伤口边缘诱导PAL,尽管其水平低于白僵菌。单独的伤害不会诱发PAL。事先用非病原体接种大麦叶片可以在7天后对随后的白僵菌攻击提供部分保护。诱导植株与非诱导植株相比,在攻毒接种后PAL活性水平没有变化。结果表明,PAL在大麦和小麦的主动防御中起着重要作用。
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来源期刊
CiteScore
4.40
自引率
0.00%
发文量
56
审稿时长
2.3 months
期刊介绍: Acta Agriculturæ Scandinavica Section B publishes original research in applied soil and plant science with special attention given to to crop production in agri- and horticultural systems. We welcome manuscripts dealing with: Climate smart and sustainable crop production systems Water and nutrient efficiency Soil conservation and productivity Precise agriculture systems Applications of bio- and nanotechnology Digitalisation and robotics Soil-plant interactions Acta Agriculturæ Scandinavica, Section B – Soil & Plant Science forms part of a series of titles published on behalf of the Nordic Association of Agricultural Science (NJF). The series also includes Section A - Animal Science .
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