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植物全息定域种新技术杨百荣植物全息定域选种,就是指从各种植物体的某一特定部位选留种子及枝条繁殖苗木的方法或技术。在生产实践中,根据不同植物作“种”的部位不同,全息定域选种可分为四种类型加以应用。1、芽的全息定域选种。用植物体上的茎芽进行无性繁殖。据试... 相似文献
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上海地区草莓炭疽病病原鉴定 总被引:20,自引:2,他引:18
Seventeen isolates of strawberry anthracnose were obtained from Shanghai suburb. According to the temperature test for mycelial growth, these isolates were divided into two groups:one was strain CMf-04 with optimal temperature of 24℃, the other was including 16 strains with optimal temperature of 28℃, and most of which could produce sexual stage on PSA media, e.g. QPg-961. Conidia of CMf-04 were hyaline, unicellular, straight and fusiform, (12.1-16.4) μm×(3.6-5.4) μm. Conidia of QPg-961 were hyaline, unicellular and ovoid to oblong, (13.0-19.7)μm×(4.1-7.3) μm. On basis of morphologcal, biological characteristics and the sequences of ribosome rDNA ITS, isolate CMf-04 from the strawberry rotten fruits was identified as Colletotrichum acutatum; while all the other isolates from the diseased leaf stalks, runners and root crowns at strawberry plantlet propagation stage were belonged to Colletotrichum gloeosporioides. It proved that C. gloeosporioides was the main pathogen of the strawberry anthracnose in summer strawberry propagation fields in Shanghai and it is of significance for the breeding of resistant strawberry and its control. 相似文献
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湿地松是我国广泛引种的树种之一,合理地加强田间管理,对促进幼苗生长发育,提高苗木产量、质量有重要作用。近年来,我们对湿地松播种育苗的生长发育过程作了一些观察,认为应划分为四个管 相似文献
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