UV spectrometry measurement on the indole alkaloids (IA) contents of seven wheat varieties (KOK1679,My295,Li,Han4564 and Yanda1817,resistant to S. avenae;Shaanximazha and Lovrin10,susceptible to S. avenae) showed that...UV spectrometry measurement on the indole alkaloids (IA) contents of seven wheat varieties (KOK1679,My295,Li,Han4564 and Yanda1817,resistant to S. avenae;Shaanximazha and Lovrin10,susceptible to S. avenae) showed that during tillering and stem elongation stages,KOK1679,My295 and Li had a higher IA content (>0.5 mg·g -1 FW);and during heading and anthesis stages,the penultimate leaves of all five resistant varieties contained higher IA (>0.5 mg·g -1 FW).The IA content was lower in the flag leaves of both resistant and susceptible varieties,but was significantly higher in the ears of resistant varieties (up to 0.645 mg·g -1 FW in KOK1679) than in those of susceptible ones.It was showed that the IA content in wheat’s ear played an important role in the resistance to S.avenae.展开更多
从傣药小灯台(Winchia catophylla A. DC.)中分到4个吲哚生物碱,经理化常数测定,光谱分析和化学转化,分别鉴定为echitamine chloride(Ⅰ),echitamidine(Ⅱ),N_b-demethyl-echitamine(Ⅲ)和22-O-acetyl-N_--demethyl-echitamine(Ⅳ),其...从傣药小灯台(Winchia catophylla A. DC.)中分到4个吲哚生物碱,经理化常数测定,光谱分析和化学转化,分别鉴定为echitamine chloride(Ⅰ),echitamidine(Ⅱ),N_b-demethyl-echitamine(Ⅲ)和22-O-acetyl-N_--demethyl-echitamine(Ⅳ),其中Ⅳ为新的吲哚生物碱。展开更多
文摘UV spectrometry measurement on the indole alkaloids (IA) contents of seven wheat varieties (KOK1679,My295,Li,Han4564 and Yanda1817,resistant to S. avenae;Shaanximazha and Lovrin10,susceptible to S. avenae) showed that during tillering and stem elongation stages,KOK1679,My295 and Li had a higher IA content (>0.5 mg·g -1 FW);and during heading and anthesis stages,the penultimate leaves of all five resistant varieties contained higher IA (>0.5 mg·g -1 FW).The IA content was lower in the flag leaves of both resistant and susceptible varieties,but was significantly higher in the ears of resistant varieties (up to 0.645 mg·g -1 FW in KOK1679) than in those of susceptible ones.It was showed that the IA content in wheat’s ear played an important role in the resistance to S.avenae.
文摘从傣药小灯台(Winchia catophylla A. DC.)中分到4个吲哚生物碱,经理化常数测定,光谱分析和化学转化,分别鉴定为echitamine chloride(Ⅰ),echitamidine(Ⅱ),N_b-demethyl-echitamine(Ⅲ)和22-O-acetyl-N_--demethyl-echitamine(Ⅳ),其中Ⅳ为新的吲哚生物碱。
