川白芷种子水溶性内源性萌发抑制物质的初步研究     

蒋运斌  马逾英  杨枝中 《作物杂志》2014,30(3):95

研究川白芷种子水溶性内源性抑制物质活性及其存在的部位。以小麦、白菜和离首种子为受体,对川白芷种子不同浸提时间、不同部位和不同浓度的水浸液进行生物活性测定。川白芷种子水浸液对3种受体植物种子的萌发有抑制作用。对白菜芽鲜重、芽干重、芽长和根长有促进作用,对根鲜重、根干重有抑制作用;对小麦幼苗生长发育有抑制作用;对离首的芽生长发育有促进作用而对根生长有抑制作用。川白芷种子和翅膜中均存在水溶性内源性萌发抑制物质,但萌发抑制效应与受体植物、浸提时间、部位和浓度相关。  相似文献   

云南滇黄精根茎腐病病原鉴定     

张磊  李辉山  杨枝中  董鲜  季鹏章  董家红  王云月 《植物病理学报》2021,51(6):1000-1004

Polygonati rhizoma is used as traditional Chinese medicine and nutritional food. Polygonatum kingianum is one of the three source species of polygonati rhizoma. Rhizome rot disease is a serious constraint to the production of P. kingianum in Yunnan Province. Two kinds of purified fungal isolates, named PkF01 and PkF02, were obtained from the rhizome rot samples. Based on morphology, analysis of tef1α and rpb2 gene sequences, two fungal strains PkF01 and PkF02 were designated as Fusarium oxysporum and F. solani, respectively. According to pathogenetic tests fufilling Koch's postulates, F. oxysporum and F. solani were identified as causal agents of rhizome rot of P. kingianum. The former showed a stronger pathogenicity on the rhizomes of P. kingianum than that of the latter one. This result is helpful to control rhizome rot on P. kingianum.  相似文献