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表皮蜡质是植物抗逆性研究的主要性状之一。本试验采用无土栽培法,选用抗旱性不同的6个大麦品种为材料,用NaCl和PEG配制的等渗溶液模拟水分胁迫,并在胁迫6d后测定各处理幼苗叶片的表皮蜡质沉积量,以探讨同一渗透胁迫条件下二者对抗旱性不同的大麦品种蜡质沉积的影响有何差异。结果表明,处理与对照之间大麦叶片的蜡质沉积量存在极显著差异,且抗旱性不同的大麦品种在同一处理条件下,蜡质沉积量存在显著或极显著差异,但同一品种,NaCl和等渗PEG处理植株的蜡质沉积量变化不显著。对于抗旱品种,PEG处理植株的蜡质含量相对较高;弱抗旱性品种,NaCl处理的植株蜡质含量相对较高。说明蜡质的变化可能是植物响应外界环境变化而进行的自我调节,这种变化因植物种类、品种类型和所处的环境不同而各异。NaCl处理与等渗PEG6000处理蜡质的沉积量变化不显著,可能是大麦幼苗对生境条件的进化适应。
Epidermal wax is one of the main traits of plant stress resistance research. In this experiment, soilless culture method was used to select six barley varieties with different drought resistance as materials. The isotonic solution prepared by NaCl and PEG was used to simulate water stress and the epidermis wax deposition was measured 6 days after stress. To explore the same osmotic stress conditions on the drought resistance of different varieties of barley wax deposition of what is the difference. The results showed that there was a significant difference in the wax deposition of barley leaves between the treatments and the control, and there was significant or extremely significant difference in the wax deposition between the two cultivars with the same drought resistance under the same treatment conditions. However, There was no significant change in the wax deposition of iso-osmosis PEG-treated plants. For drought-resistant cultivars, the wax content of PEG-treated plants was relatively high; the wax content of weak-drought-resistant and NaCl-treated plants was relatively high. It shows that waxy changes may be self-regulation of plants in response to changes in the external environment, which vary according to the plant species, the type of species and the environment in which they are located. There was no significant change in the deposition of wax between NaCl and isotonic PEG6000, which may be the evolutionary adaptation of barley seedlings to habitat conditions.