{"title":"RESPONSES OF BARLEY AND WHEAT TO PATHOGENS, NON-PATHOGENS AND WOUNDING AS INDICATED BY INDUCED PHENYLALANINE AMMONIA-LYASE ACTIVITY","authors":"S. Peltonen","doi":"10.1080/09064719809362497","DOIUrl":null,"url":null,"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...","PeriodicalId":40817,"journal":{"name":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"1998-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Agriculturae Scandinavica Section B-Soil and Plant Science","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1080/09064719809362497","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRONOMY","Score":null,"Total":0}
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...
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 .