【摘要】 以体细胞杂种红橘+枳、Troyer枳橙、Swingle枳柚和枳作砧木的‘国庆4号’温州蜜柑幼树为试材,通过大棚盆栽研究了4种砧木对幼树光合特性的影响。结果表明:嫁接在不同砧木上的温州蜜柑幼树的净光合速率(Pn)日变化相似,均表现出双峰曲线,首峰出现在10:00时,次峰小于首峰,出现在13:00时以后;综合净光合速率、蒸腾速率(Tr)、水分利用效率(WUE)、羧化效率(CE)和表观光量子效率(AQY)等可以看出Troyer枳橙幼树光合性能最弱,枳最强,红橘+枳和Swingle枳柚介于两者之间;可溶性蛋白、比叶重和色素含量等生理指标结果显示,枳表现最优光合特性,另外3种砧木差异不明显;在设施条件下Pn与气孔导度(Gs)、相对湿度(RH)和Tr呈正相关,与胞间CO2浓度(Ci)呈负相关,与温度(Tair)、叶面水气压亏缺(VpdL)和光照强度(PAR)相关性复杂。更多还原

【Abstract】 It was conducted with‘Guoqing 4’Satsuma mandarin young tree whose rootstocks were Trifoliate, Sexual hybrid Troyer Citrange,Swingle Citrumelo and somatic hybrid Red tangerine+Trifoliate. Studing on the effects of rootstocks on the net photosynthesis rate（Pn） through potted experiment in the green house. The results showed that: The diurnal variation of Pn in young tree with different rootstocks was seminar and presented bimodal carve, the first peak occurred at 10:00, the second peak occurred after 13:00 and the value was lower than the first one. With the analysis of Pn, transpiration rate （Tr）,water use efficiency（WUE）,apparent quantum yield（AQY） and carboxylation efficiency（CE）, the results were the young tree—Troyer Citrange had a weaker photosynthesis, Trifoliate’s photosynthesis was the best, red tangerin+Trifoliate and Swingle Citrumelo was between the above two; Trifoliate had a higher physiological value in soluble protein, specific leaf weight and photosynthetic pigment, the other three didn’t have remarkable difference. Under protected condition,Pn had obvious positive relationship with stomatal conductance（Gs）, Tr and relative humidity（RH）, Pn had obvious negative relationship with intercellular CO₂ concentration（Ci）, there were complex relation between Pn and air temperature （Tair）, photosynthesis availability radiation （PAR） and vapor pressure deficit at the leaf surface（Vpdl）.更多还原