Abstract：In the hilly areas of Tai-hang Mountains, drought stress is a crucial factor limiting the survival and growth of plants. Detailed knowledge about the responses of Platycladus orientalis with different water treatments (i. e. well-watered, mild drought stress, moderate drought stress, and severe drought stress) to water stress would benefit us for the success of re-vegetation programs. The cholorophyll fluorescence parameters and leaf temperature of potted P. orientalis were measured experimentally. Prolonged severe drought stress increased the temperature, the non-photochemical quenching coefficient and decreased the max fluorescence (Fm ), the variable fluorescence (Fv ), the maximum quantum efficiency of PSⅡ photochemistry (Fv / Fm), potential photochemical efficiency (Fv / F0 ), the actual photochemical efficiency and the electron transport rate. The basis fluorescence (F0) exhibited a rising trend. The daily variation of the actual photochemical efficiency, the electron transport rate and the non-photochemical quenching coefficient were regular at different degrees of water stress. The curves of daily variation of the actual photochemical efficiency were concave in P. orientalis with heavier degree, while the curves of daily variation of the electron transport rate and the non-photochemical quenching coefficient were approximately unimodal at different degrees of water stress.
董果1, 戴勐1, 赵勇1, 李建中2, 侯娜1, 宋晓明1, 樊巍3. 侧柏叶温及叶绿素荧光特性对土壤水分胁迫的响应[J]. 中国水土保持科学, 2014, 12(1): 68-74.
DONG Guo, DAI Meng, ZHAO Yong, LI Jian-Zhong, HOU Na, SONG Xiao-Meng, FAN Wei. Responses of leaftemperature and characteristics of chlorophyll fluorescence of Platycladus orientalis to soil water stress. SSWCC, 2014, 12(1): 68-74.
2014, Vol. 12 
