月季在城市园林绿化中的应用前景

目的探索外施水杨酸和茉莉酸甲酯对盐胁迫下月季品种月月粉生理特性的影响。方法采用水培方法，对月月粉幼苗进行高盐胁迫处理、外源激素处理以及盐与激素共处理，测定处理组和对照组的叶绿素、脯氨酸和丙二醛含量以及过氧化物酶、过氧化氢酶和超氧化物歧化酶活性。结果相较于单独盐胁迫，盐胁迫下外施水杨酸和茉莉酸甲酯使月月粉叶片叶绿素含量分别提高了98.03%和80.05%，叶片中脯氨酸含量分别提高了57.23%和49.72%，根系中脯氨酸含量分别提高了56.75%和89.31%，叶片中丙二醛含量分别降低了29.92%和16.79%，根系中丙二醛含量分别降低了28.62%和20.52%。结论外施水杨酸和茉莉酸甲酯处理均可缓解盐胁迫对月月粉的伤害，且茉莉酸甲酯的缓解效果优于水杨酸。

The novel rose MYB transcription factor RhMYB96 enhances salt tolerance in transgenic Arabidopsis

PurposeTo study the effects of salicylic acid and methyl jasmonate on the physiological characteristics of Rosa chinensis ‘Old Blush’ under salt stress.MethodsThe cutting seedlings were treated with high salt stress, exogenous hormone, salt stress and exogenous hormone co-treatment by hydroponic culture, and the chlorophyll content, proline content, malondialdehyde content, activity of peroxidase, activity of catalase and activity of superoxide dismutase were measured in the treatment group and control group.ResultCompared with the simple salt stress, the external application of salicylic acid under salt stress and external application of methyl jasmonate under salt stress could respectively increase the chlorophyll content in leaves of ‘Old Blush’ by 98.03% and 80.05%; these two external application resulted in a 57.23% and 49.72% increase of proline content in leaves of ‘Old Blush’ and a 56.75% and 89.31% increase of proline content in roots of ‘Old Blush’; these also resulted in a 29.92% and 16.79% decrease of malondialdehyde content in leaves and a 28.62% and 20.52% decrease of malondialdehyde content in roots.ConclusionThe external application of salicylic acid and methyl jasmonate both could alleviate the damage of salt stress on ‘Old Blush’, and the effect of methyl jasmonate is better than that of salicylic acid.