摘要
研究盐胁迫对梅花光合作用的影响对土地盐渍化地区的梅花种植具有重要意义。选取5个不同水平的盐浓度,以‘丰后’梅的自根苗和嫁接苗为材料,研究对其光合生理特性和叶绿素荧光参数的影响。结果表明,随着盐浓度的增加,自根苗和嫁接苗的净光合速率(P n)、气孔导度(G s)、蒸腾速率(T r)、可变荧光(F v)、潜在光化学效率(F v/F 0)、PSⅡ最大光化学量子产量(F v/F m)、PSⅡ有效光化学量子产量(F v′/F m′)、PSⅡ实际光化学量子产量(Y(Ⅱ))、表观光合电子传递效率(ETR)和光化学猝灭系数(qP)呈现下降趋势,叶片胞间CO 2浓度(C i)和非光化学淬灭系数(NPQ)呈现上升趋势且自根苗弱于嫁接苗。在0.3%盐处理下自根苗和嫁接苗的光合能力没有受到较大影响,而0.6%~0.9%盐处理下嫁接对提高植物光合能力具有显著作用,在1.2%~1.5%盐处理下不具有显著作用。自根苗在各浓度处理下受到非气孔限制,嫁接苗在0.3%处理下受到的是气孔限制,在0.6%~1.5%处理下受到非气孔限制。
It is of great significance to study the effects of salt stress on photosynthetic of Prunus mume in the cultivation and popularization in salinization soil.Five different levels of soil salt content were set up to study the effects of on photosynthetic physiological characteristics and chlorophyll fluorescence parameters of the own-rooted seedlings of P.mume cultivar‘Fenghou’and grafted seedlings.The results showed that with the increase of salt content,physiological indices such as P n,G s,T r,F v,F v/F 0,F v/F m,F v′/F m′,Y(Ⅱ),ETR,and qP showed downward trends.C i and NPQ showed an upward trend.And self-rooted seedlings were weaker than grafted seedlings.The photosynthetic capacity of own-rooted and grafted seedlings was not significantly affected under 0.3%salt treatment,but grafting seedlings had significant effect on improving photosynthetic capacity of plants under 0.6%-0.9%salt contents,and had no significant effect under 1.2%-1.5%salt contents.The own-rooted seedlings were restricted by non-stomatal under different concentrations and the grafted seedlings were restricted by stomatal under 0.3%treatment,by non-stomatal under 0.6%-1.5%treatments.
作者
赵靓
杨佳鑫
禹世豪
何立飞
王静
李悦
李海燕
肖可
李庆卫
ZHAO Liang;YANG Jia-xin;YU Shi-hao;HE Li-fei;WANG Jing;LI Yue;LI Hai-yan;XIAO Ke;LI Qing-wei(Beijing Key Laboratory of Ornamental Plants Germplasm Innovation&Molecular Breeding,National Engineering Research Center for Floriculture,Beijing Laboratory of Urban and Rural Ecological Environment,Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education,School of Landscape Architecture,Beijing Forestry University,Beijing 100083,China)
出处
《西北林学院学报》
CSCD
北大核心
2019年第6期43-48,共6页
Journal of Northwest Forestry University
基金
科学研究与研究生培养共建科研项目-北京实验室-北京城乡节约型绿地营建技术与功能型植物材料高效繁育(2016GJ-03)
关键词
梅花
盐胁迫
嫁接
光合生理特性
叶绿素荧光参数
Prunus mume
salt stress
grafting
photosynthetic physiological characteristics
chlorophyll fluorescence parameter
