CAJ | 학술논문

采用K_2(CrO_4)_3溶液,设5个浓度,对3种不同抗性的小麦品种(新麦19、矮抗58和豫麦18)进行萌发期胁迫处理,研究了幼苗的发芽势、发芽率、根长、芽长及内源激素含量的变化.结果表明:(1)随着铬浓度的增加,发芽势、发芽率和芽长均基本呈"先升后降"趋势;(2)同一浓度铬处理下,发芽率、发芽势和芽长从大到小的顺序依次为:新麦19、矮抗58、豫麦18,根长从大到小的顺序为:豫麦18、新麦19、矮抗58;(3)150 mg L~(-1)的铬胁迫下,IAA与ABA在小麦幼苗、幼根中含量降低,在籽粒中含量升高,其中新麦19籽粒和根芽中ABA含量均高于其他品种的;(4)不同浓度铬胁迫下,IAA/ABA值在新麦19中最低,变化幅度最小,新麦19表现出较强的抵抗铬胁迫能力.图3表1参20
채용K_2(CrO_4)_3용액,설5개농도,대3충불동항성적소맥품충(신맥19、왜항58화예맥18)진행맹발기협박처리,연구료유묘적발아세、발아솔、근장、아장급내원격소함량적변화.결과표명:(1)수착락농도적증가,발아세、발아솔화아장균기본정"선승후강"추세;(2)동일농도락처리하,발아솔、발아세화아장종대도소적순서의차위:신맥19、왜항58、예맥18,근장종대도소적순서위:예맥18、신맥19、왜항58;(3)150 mg L~(-1)적락협박하,IAA여ABA재소맥유묘、유근중함량강저,재자립중함량승고,기중신맥19자립화근아중ABA함량균고우기타품충적;(4)불동농도락협박하,IAA/ABA치재신맥19중최저,변화폭도최소,신맥19표현출교강적저항락협박능력.도3표1삼20
Chromium (Cr) affects the growth of wheat plants (Triticum aestivum L.) badly. There are reports about the restrictive function of Cr to wheat growth and development. Understanding the mechanism of Cr resistance of wheat cultivars is of importance to wheat production and breeding, in this experiment, three wheat varieties Xinmai 19, Aikang 58 and Yumai 18 were used as experimental material. The seeds of each cultivar were water-cultivated at Cr eoneentrations of 0, 25, 50, 100, 150 mg L~(-1) to investigate the effect of Cr on germination energy, germination percentage, root length, shoot length and the endogenous hormones contents in roots and shoots at germination stage. The results showed: (1) With the increase in Cr concentration, the germination energy, germination percentage, root length and shoot length increased first and declined then; (2) Under the same Cr concentration treatment, the characteristics of germination energy, germination percentage and shoot length were found in an order: Xinmai 19 > Aikang 58 > Yumai 18, and the root length: Yumai 18 > Xinmai 19 > Aikang 58; (3) The treatment with 150 mg L~(-1) chromium caused the decrease in IAA and ABA contents in roots and shoots, and the increase in seeds. Compared with the other two wheat varieties, Xinmai 19 showed a higher ABA content in seeds, roots and shoots; (4) The ratios of IAA/ABA of Xinmai 19 were lower than those of the other two varieties under Cr stress. Xinmai 19 had a stronger ability to resist the Cr stress than the others. Fig 3, Tab 1, Ref 20