Involvement of Chromosomes 5A and 5D in Cold-Induced Abscisic Acid Accumulation in and Frost Tolerance of Wheat Calli

The relationship between frost tolerance and abscisic acid (ABA) accumulation was studied in callus cultures of three wheat cultivars differing in the level of frost-tolerance, and of the 5A and 5D chromosome substitution lines from the frost-tolerant variety ‘Cheyenne’ into frost-sensitive ‘Chinese Spring’. Following cold hardening, the increase in ABA level in the calli of the two frost tolerant cultivars was significantly higher than in those of the frost-susceptible cultivar. Similarly, in 5A and 5D substitution lines, significantly higher ABA levels were detected than in the recipient ‘Chinese Spring’. One week-long ABA treatment at 26 °C induced a significantly higher level of frost tolerance than that achieved by cold hardening, irrespective of the frost sensitivity of the examined genotypes.     

植物引种驯化研究概述

引种驯化试验是不断充实和加强植物资源基因库,丰富植物品种多样性的一种重要举措。文章正是在阅读大量相关文献的基础上,阐述引种驯化的定义、理论和方法,并对引种驯化的影响因素和引种试验技术进行详细介绍,从而更好的了解引种驯化的全过程,对引种试验的成功开展具有指导作用。     

有利于炼苗的带脚垫漂浮育苗盘烤烟育苗技术研究

[目的]降低烤烟漂浮育苗时炼苗成本和降低劳动强度.[方法]采用常规漂浮盘和带脚垫漂浮盘进行烤烟育苗,比较不同漂浮盘处理烟苗成苗后植物学性状和用工成本.[结果]使用带脚垫的烤烟漂浮育苗盘,通过营养液液面自然蒸发降低,使漂浮盘自然脱离液面,达到烟苗脱离水分和营养的炼苗目的,有效减少炼苗用工和劳动强度;每百盘烟苗比常规漂浮盘...