摘要
本试验用浸根接种法对30份不同类型的辣椒种质资源进行了枯萎病苗期人工接种鉴定,并在此基础上探讨了抗枯萎病的某些生物化学和细胞学机制。结果表明,辣椒子叶中易溶性蛋白质含量及幼苗根系中辣椒素含量均与抗病性成正相关。通过扫描电镜观察4个不同抗病性水平的辣椒材料幼苗主根的横剖面结构,发现导管腔的大小、细胞排列、细胞壁的厚度以及导管周围纤维细胞的发达程度等与抗病性密切相关。
The present studies concluded that the root-dip inoculation method is the best technique for identifying and screening the Fusarium wilt resistance of pepper germplasm. It was found that the optimum inocula-tion concentration is 106 spores/ml, and the suitable pathogenesis tem-perature is 25-28 ℃. Meanwhile, 30 pepper germplasm/accessions were identified by using artificial inoculation method at the seedling stage, and some resistant germplasm were found that can be used for pepper breeding resistant to Fusarium wilt. On the basis of these studies, it was proved that there was significant correlation between resistance and content of capsaicin in the seedling roots and content of protein in the cotyledons at the cotyledon stage. It was also found that the size and arrangement of vessel cells and the thickness of cell wall of vessels are closely related to Fusarium wilt resistance.
出处
《园艺学报》
CAS
CSCD
北大核心
1991年第2期153-158,共6页
Acta Horticulturae Sinica
关键词
辣椒
种质资源
枯萎病
抗病性
Pepper
Germplasm
Fusarium wilt
Resistance
