Photosynthetic behavior of Spanish Arbequina and Italian Maurino olive (Olea europaea L.) cultivars under super-intensive grove conditions
Photosynthetic behavior of Spanish Arbequina and Italian Maurino olive (Olea europaea L.) cultivars under super-intensive grove conditions
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西班牙阿贝奎纳和意大利毛里诺橄榄 (Olea europaea L.) 品种在超密集树林条件下的光合行为
DOI：
10.1007/s11099-012-0025-7
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
L. Ilarioni
中科院分区：
文献类型：
--
作者：
P. Proietti;L. Nasini;L. Ilarioni
该研究在意大利中部一个四年生超高密度橄榄格罗夫林进行，比较西班牙Arbequina和意大利Maurino橄榄品种的叶片气体交换。总体而言，从7月中旬到11月中旬，毛里诺有一个稍高的最大光饱和净光合速率（PNmax）比Arbequina。PNmax最低值和最高值分别出现在7月底和11月中旬。当季叶的PNmax值与一年生叶相似或略高。在白天，Maurino总是有稍高的值或类似于Arbequina的值，最高的PNmax在早上。Maurino的暗呼吸率（RD）值与Arbequina相似或更高。在白天，两个品种的RD在9：00比下午低。两种基因型的光合辐射响应曲线的模式相似，但表观量子效率（YQ）较高的Maurino。两个品种的胞间CO2浓度（Ci）随PNmax的降低而增加。Cicor的增加与气孔导度（gs）的降低有关。蒸腾速率（E）在7月中旬至8月上旬呈上升趋势，9月下降，11月又呈上升趋势。特别是在上午，当季叶表现出类似或略高于一年生叶。在白天，在两个品种和两个叶龄，E是在下午较高。没有影响叶气体交换由于水果的存在或不存在的shoot.Overall，有令人满意的生理适应Arbequina中央意大利的条件和Maurino的超级密集的格罗夫条件。
The study was carried out in a four-year-old super-high density olive grove in Central Italy to compare leaf gas exchanges of Spanish Arbequina and Italian Maurino olive cultivars. Overall, from mid July to mid November, Maurino had a slightly higher maximum light-saturated net photosynthetic rate (PNmax) than Arbequina. The lowest and the highestPNmaxvalues were recorded at the end of July and in mid November, respectively. Current-season leaves showed similar or slightly higherPNmaxvalues than one-year-old leaves. During the day Maurino always had slightly higher values or values similar to Arbequina, with the highestPNmaxbeing in the morning. Maurino had similar or higher dark respiration rate (RD) values compared to Arbequina. During the day, in both cultivars theRDwas lower at 9:00 than in the afternoon. The pattern of the photosynthetic irradiance-response curve was similar in the two genotypes, but the apparent quantum yield (YQ) was higher in Maurino. In both cultivars intercellular CO2concentration (Ci) tended to increase whenPNmaxdecreased. The increase inCicorresponded to a decrease in stomatal conductance (gs). The transpiration rate (E) increased from mid July to the beginning of August, then decreased in September and increased again in November. Particularly in the morning, the current-season leaves showed similar or slightly higherEvalues than the one-year-old leaves. During the day, in both cultivars and at both leaf ages,Ewas higher in the afternoon. No effects on leaf gas exchanges due to the presence or absence of fruit on the shoot were found. Overall, there was satisfactory physiological adaptation for Arbequina to the conditions of Central Italy and for Maurino to the superintensive grove conditions.