CAJ | 학술논문

在田间条件下,以3个杂交棉品种(鲁棉研25、石杂2号和新陆早43)和2个常规棉花品种(新陆早13和新陆早33)为试验材料,通过两年试验研究了不同类型品种冠层叶片和非叶绿色器官(苞叶、铃壳和茎秆)的群体光合速率、叶绿素含量、叶绿素荧光参数和光合机构电子传递特性,及其与光合物质生产的关系.结果表明,杂交棉石杂2号和新陆早43非叶绿色器官的群体光合速率显著高于常规棉品种,其中果实(铃壳和苞叶)和茎秆的群体光合速率分别比2个常规棉平均高85.1%和197.6%.叶片的叶绿素含量和实际光化学效率最高,铃壳次之,苞叶和茎秆最小;与常规棉品种相比,杂交棉品种叶片和苞叶的实际光化学效率无显著差异,但铃壳和茎秆的实际光化学效率显著较高;非叶绿色器官光合物质生产能力的提高与其对强光的适应能力和抗光抑制能力关系密切.
재전간조건하,이3개잡교면품충(로면연25、석잡2호화신륙조43)화2개상규면화품충(신륙조13화신륙조33)위시험재료,통과량년시험연구료불동류형품충관층협편화비협록색기관(포협、령각화경간)적군체광합속솔、협록소함량、협록소형광삼수화광합궤구전자전체특성,급기여광합물질생산적관계.결과표명,잡교면석잡2호화신륙조43비협록색기관적군체광합속솔현저고우상규면품충,기중과실(령각화포협)화경간적군체광합속솔분별비2개상규면평균고85.1%화197.6%.협편적협록소함량화실제광화학효솔최고,령각차지,포협화경간최소;여상규면품충상비,잡교면품충협편화포협적실제광화학효솔무현저차이,단령각화경간적실제광화학효솔현저교고;비협록색기관광합물질생산능력적제고여기대강광적괄응능력화항광억제능력관계밀절.
In addition to the green leaves, commonly considered as the primary sources of photosynthate production, higher plants can potentially use almost all vegetative and reproductive structures to perform photosynthetic CO_2 assimilation. Study on photosynthetic activity of the different green organs is of great significance to develop the potential of photosynthesis of the whole plant. The green organs in cotton (Gossypium hirsutum L.) consist of leaf and non-foliar organs including bract, boll, and stem. Field experiments were conducted to evaluate the chlorophyll content, chlorophyll fluorescence, electron transport of photosynthetic apparatus and canopy photosynthesis rate, and the correlation of photosynthetic activity with matter production in different green organs of cotton. Three super high-yielding hybrid cotton cultivars, Lumianyan 25, Xinluzao 43, and Shiza 2, and two traditional cotton cultivars, Xinluzao 13 and Xinluzao 33, were grown with Under-Mulch-Drip irrigation in Xinjiang province. The results revealed that both the chlorophyll content and actual quantum yield of PS Ⅱ were higher in leaf, followed by boll, bract and stem. Compared to traditional cotton, hybrid cotton cultivars had higher actual quantum yield of PS Ⅱ in boll and stem, whereas no differences were observed on leaf and bract. As expected, higher canopy photosynthesis rate was presented in non-foliar green organs of high-yielding hybrid cotton. Furthermore, there were significant correlations of dry matter production with adaptability of high-light and faster restoration after photoinhibition in non-foliar green organs of high-yielding hybrid cotton.