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以白鸡冠半同胞系F1代中25个新品系(11个黄白化新品系和14个绿叶新品系)为研究对象,观测茶树新梢生物量、生育期、叶片功能性状及光合性能,并分析两类茶树新品系之间的差异。结果表明:与母本白鸡冠相比,25个新品系新梢生物量均增加(15号和24号除外),增幅为25.0%~106.25%,一芽三叶期提前(早、中生种比例达84%);黄白化新品系叶片面积(LA)和比叶面积(SLA)明显增加,干物质含量(LDMC)则明显降低,其他指标变化不明显;绿叶新品系叶片面积(LA)和光合色素指标均明显增加,其他指标变化趋势不明显。此外,黄白化新品系叶片的LA和光合色素指标平均值显著低于绿叶新品系,而叶片的SLA、Chla/Chlb和Car/Chl比值平均值显著高于绿叶新品系。黄白化新品系叶绿素含量平均值仅为绿叶新品系的42.29%,但各项光合性能指标并未下降(只有3号和6号光合色素过低时显著下降),说明该黄白化新品系在一定叶绿素含量范围内,单位叶绿素的光合效率较高,可能是对叶绿素含量低的一种生理补偿,有待进一步从生理和分子方面深入研究。
Twenty-five new lines (11 yellowing lines and 14 new leafy lines) of F1 generation of white cockscomb half lines were selected as research object to observe the biomass, growth period, leaf functional traits and photosynthetic characteristics of new shoots in tea tree, Differences between two new lines of tea trees. The results showed that biomass of 25 new shoots increased (except 15th and 24th) compared with that of female white white corns, with an increase of 25.0% -106.25% The leaf area (LA) and specific leaf area (SLA) of the new lines of yellowing and whitening increased significantly, while the dry matter content (LDMC) of the new lines of yellowing and whitening decreased significantly while the other indexes did not change obviously. Photosynthetic pigment indicators were significantly increased, the trend of other indicators is not obvious. In addition, the average values of LA and photosynthetic pigment in leaves of new yellowing and whitening lines were significantly lower than those in new leafy lines, while the average values of SLA, Chla / Chlb and Car / Chl in leaves were significantly higher than those in new leafy lines. The average content of chlorophyll in the new lines of yellow and white lines was only 42.29% of the new lines of green leaves, but the photosynthetic performance indexes did not decrease (only significantly decreased when the photosynthetic pigments 3 and 6 were too low) Chlorophyll content within the unit of chlorophyll photosynthetic efficiency may be a physiological compensation for low chlorophyll content needs further study from the physiological and molecular aspects.