摘要
八年生嫩江云杉和红皮云杉苗木，经喷施20、50、100mmol·L^-1Na2SO3和NaHSO3（摩尔浓度为3：1）的混合液后第3、11、20天测定多个生理指标的结果显示，喷后第3天，2种云杉的净光合速率（Pn），光系统II（PSII）的最大光能转换效率（Fv/Fm），光化学量子效率（ФPSII），叶绿素a（Chla）、叶绿素b（Chlb）和类胡萝卜素含量均下降；相对电导率上升；苗木受到胁迫的程度随着Na2SO3和NaHSO3混合液浓度的提高而增大。喷后第8-20天各种生理指标开始恢复。气孔导度（Gs）和胞间CO2浓度（G）变化不显著。红皮云杉对胁迫的敏感度高于嫩江云杉，但其在重度胁迫后的修复能力强于嫩江云杉。
The eight-year-old Korean spruce （Picea koraiensis） and Nenjiang spruce （Picea koraiensis var. nenjiangensis） seedlings were sprayed with 20, 50 and 100 mmol·L^-1 mixed liquid of Na2SO3 and NaHSO3 （molar concentration is 3：1）. Some physiological indexes were determined at 3, 11 and 20 d after treatment. The results showed that net photosynthetic rate （Pn）, maximum efficiency of photosystem II （Fv/Fm）, photochemical quantum efficiency （ФPSII）, Chla, Chl b and carotenoid contents decreased at the 3 d after treatment. Meanwhile, the electrical conductivity rised. The degree of injury increased with the stress increasing. The physiological indexes resumed at the 8-20 d after treatment. There were no significant changes of stomatal conductance and intercellular CO2. The sensitivity to stress of Korean spruce was higher than that of Nenjiang spruce, and the self-recovering capability of Korean spruce was better than that of Nenjiang spruce under serious stress of mixed liquid of Na2SO3 and NaHSO3.
出处
《植物生理学通讯》
CAS
CSCD
北大核心
2007年第2期259-263,共5页
Plant Physiology Communications
基金
黑龙江省科技攻关重点项目(GB02103)。
关键词
红皮云杉
嫩江云杉
Na2SO3和NaHSO3混合液
生理指标
Korean spruce （Picea koraiensis）
Nenjiang spruce （Picea koraiensis var. nenjiangensis）
mixed liquid of Na2SO3 and NaHSO3
physiological indexes
