EFFECT OF ABSCISIC-ACID ON RISHITIN AND LUBIMIN ACCUMULATION AND RESISTANCE TO PHYTOPHTHORA-INFESTANS AND CLADOSPORIUM-CUCUMERINUM IN POTATO-TUBER TISSUE-SLICES
EFFECT OF ABSCISIC-ACID ON RISHITIN AND LUBIMIN ACCUMULATION AND RESISTANCE TO PHYTOPHTHORA-INFESTANS AND CLADOSPORIUM-CUCUMERINUM IN POTATO-TUBER TISSUE-SLICES
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DOI：
10.1094/phyto-70-1074
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发表时间：
1980-01-01
期刊：
影响因子：
3.2
通讯作者：
KUC, J
中科院分区：
文献类型：
--
作者：
HENFLING, JWDM;BOSTOCK, R;KUC, J
测试了与马铃薯类倍半萜胁迫代谢物（SSM）类似的许多萜烯对用来自致病疫霉培养物的激发子制剂处理的马铃薯块茎切片中的瑞施汀和鲁比明积累的影响。脱落酸（阿坝）是唯一的化合物，一贯和强烈抑制rishitin和lubimin积累。阿坝还显著抑制了致病疫霉不亲和小种接种的叶片中rishitin和lubimin的积累。不相容的小种在接种前用阿坝处理的切片上生长并产孢，并且该反应与相容小种诱导的反应没有区别。阿坝不影响积累的rishitin和lubimin或真菌生长的切片接种兼容的种族的真菌，它不刺激真菌生长的定义媒体。C.黄瓜病菌（cucumerinum）在接种前经阿坝处理的块茎切片上生长良好，产孢量大。阿坝促进接种C.黄瓜属。阿坝处理的马铃薯切片中Rishitin和Lubimin的积累减少显然不是与马铃薯晚疫病菌的不相容相互作用转化为相容相互作用的原因。这些数据对SSM作为负责在马铃薯和致病疫霉的不相容相互作用中包含真菌的主要因子的作用产生了一些怀疑。
A number of terpenes similar to the potato sesquiterpenoid stress metabolites (SSM) were tested for their effect on the accumulation of rishitin and lubimin in potato tuber slices treated with an elicitor preparation from cultures of P. infestans. Abscisic acid (ABA) was the only compound that consistently and strongly inhibited rishitin and lubimin accumulation. ABA also markedly inhibited the accumulation of rishitin and lubimin in slices inoculated with incompatible races of P. infestans. Incompatible races grew and sporulated on slices treated with ABA prior to inoculation, and the reaction was indistinguishable from that induced by compatible races. ABA did not affect the accumulation of rishitin and lubimin or fungal growth in slices inoculated with compatible races of the fungus, and it did not stimulate fungal growth in defined media. C. cucumerinum, a pathogen of cucumber but not of potato, grew well and sporulated abundantly on tuber slices treated with ABA prior to inoculation. ABA increased the accumulation of rishitin and lubimin in slices inoculated with C. cucumerinum. The reduced accumulation of rishitin and lubimin in potato slices treated with ABA apparently was not responsible for the conversion of incompatible to compatible interactions with P. infestans. The data cast some doubt on the role of the SSM as primary agents responsible for containing the fungus in incompatible interactions of potato and P. infestans.