4种不同类型越桔叶片光合作用温度特性的比较研究

Photosynthetic Temperature Characteristicin Four Different Types of Blueberry Leaves

对４ 种不同类型越桔叶片光合作用温度特性的比较结果表明：红豆越桔、矮丛越桔、半高丛越桔和高丛越桔叶片净光合速率（ＣＯ２） 的变化范围分别在５－５８ ～８－２８、５－３０ ～７－４８ 、４－９５ ～７－２４ 和４－０６ ～７－１８ μｍｏｌ／（ｍ２·ｓ），其光合作用温度下限分别为０ ℃～３ ℃、２ ℃～４ ℃、３ ℃～６ ℃和３ ℃～６ ℃；其温度上限分别为４２ ℃～４５ ℃、４２ ℃～４５ ℃、４４ ℃～４６ ℃和４４ ℃～４７ ℃，其最适温度范围分别为１８ ℃～２５ ℃、２０ ℃～２７ ℃、２５ ℃～３０ ℃和２５ ℃～３３ ℃；叶片量子产额在不同温度条件下均呈单峰曲线型变化，红豆越桔、矮丛越桔、半高丛越桔和高丛越桔叶片量子产额的峰值分别出现在２０ ℃、２５ ℃、２５ ℃和３０ ℃，并表现为红豆越桔＞ 矮丛越桔＞ 半高丛越桔＞ 高丛越桔；从光合与呼吸ＣＯ２ 交换比值来看，红豆越桔和矮丛越桔的最高值分别出现在２０ ℃和２５ ℃，而半高丛越桔与高丛越桔在１５ ℃～３０ ℃时均表现出较高的比值；在光合适宜温度范围内，４ 种类型越桔叶片光合作用的光补偿点和光饱和点表现为红豆越桔＜ 矮丛越桔＜ 半高丛越桔＜ 高丛越桔。

The results showed thatthe net photosynthetic rate oflingonberry ,lowbush ,half high bush and highbush blueberry leaves werein the range of 5-58 ～8-28 ,5-30 ～7-48 ,4-95 ～7-24 and 4-06 ～7-18 μmolCO2/(m 2·s)-Thelowesttemperature of photosynthesisofthem were 0 ℃～ 3 ℃,2 ℃～4 ℃,3 ℃～6 ℃and 3 ℃～6 ℃- The highest temperature of photosynthesis of them were 42 ℃～45 ℃, 42 ℃～45 ℃, 44 ℃～46 ℃and 44 ℃～47 ℃- The optimun temperature of photosynthesis ofthem were 18 ℃～25 ℃,20 ℃～27 ℃,25 ℃～30 ℃and 25 ℃～33 ℃- Apparent quantum yield showed a single peak curve change under differenttemperature, maxmum values of lingonberry,lowbush , half highbush and highbush blueberry leaves were measured in 20 ℃, 25 ℃,25 ℃and 30 ℃- Apparent quantum yield of lingonberry was the highest- Lowbush blue berry′s was higher-Half highbush blueberry′s was lower- Highbush blueberry′s was the low est-The light compensation point and light saturtion point oflingonberry were thelowest- Low bush blueberry′s werelower- Half highbush blueberry′s were highter- Highbush blueberry′s were hightest-