摘要
为了探讨弱光胁迫对烤烟早花的影响,采用田间试验研究了人工遮光对烤烟品种K326、抗早花烤烟新品系HY06生长发育及光合特性的影响。结果表明:遮光对烤烟生长有显著影响,44%自然光强下处理30 d时,两个品种(系)的株高显著降低、茎围显著减小,但HY06株高高于K326;遮光对烤烟的现蕾有显著影响,44%自然光强下处理30 d时,两个品种(系)现蕾时有效叶数显著减少,现蕾时间大多推迟,HY06现蕾时有效叶数多于K326;遮光对烤烟的光合特性也有显著影响,遮光处理的烟叶净光合速率、气孔导度、叶片光合放氧速率显著降低,胞间二氧化碳浓度显著升高,HY06的叶片叶绿素、类胡萝卜素含量(质量分数)以及净光合速率高于相同遮光处理下的K326,44%自然光照强度下合成叶绿素b的能力强于K326。因此,抗早花新品系HY06具有更强的弱光适应性。
In order to investigate the effects of light stress on the early flowering of flue-cured tobacco, the effects of artificial shading on the growth, development and photosynthetic characteristics of flue-cured tobacco cv. K326 and anti-early flowering flue-cured tobacco line HY06 were studied via field experiments. The results showed that after growing under 44% of natural light intensity for 30 days, 1） the growth of flue-cured tobacco was significantly influenced by shading. The plant height and stalk circumference of the two varieties decreased significantly, although the plant height of HY06 was taller; 2） the flower budding of the flue-cured tobacco was significantly affected by the shading treatment. The number of effective leaves at the budding stage of the two varieties were reduced remarkably, with HY06 displayed more than the other variety; the flower budding stage was also delayed; 3） shading significantly decreased the net photosynthetic rate, stomatal conductance and photosynthetic oxygen evolution rate of the tobacco leaves and significantly increased intercellular CO2 concentration. The contents of chlorophyll and carotenoid, net photosynthetic rate and chlorophyll b synthesizing capability of HY06 were higher than those of K326. These results indicate that new anti-early flowering line HY06 possesses a better adaptability for weak light.
出处
《烟草科技》
EI
CAS
CSCD
北大核心
2016年第1期14-21,53,共9页
Tobacco Science & Technology
基金
国家烟草专卖局重点科技项目"耐低温抗早花烤烟新品种选育及遗传生理机理研究"(中烟办[2010]2号
110200902043)
广东省烟草专卖局(公司)科技项目"广东浓香型特色优质烟叶开发"(粤烟科[2011]28号
201101)
"优质烤烟理想生育进程的研究与应用"(粤烟科[2014]1号
201311)
"优质烟叶精准水肥管理技术的规模应用与示范"(粤烟科[2014]1号
201312)
关键词
烤烟
遮光
品种(系)
生长发育
光合特性
Flue-cured tobacco
Shading
Variety （line）
Growth and development
Photosynthetic characteristic
