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以 1 年生苹果砧木 M9T337 幼苗为试材，采用叶绿素荧光分析和 13C 同位素示踪技术，水培条件下研究了不同供钾水平（0.02、0.5、2 和 6 mmol · L-1）对幼苗光合生理特性、叶绿素荧光特性以及13C 光合产物积累和分配的影响。结果表明：与正常供钾（6 mmol · L-1 K+ ）对照处理相比，低钾胁迫下苹果砧木 M9T337 幼苗各器官生物量、净光合速率（Pn）和气孔导度（...
以5 个砧木（平邑甜茶、八棱海棠、楸子、新疆野苹果、东北山荆子）与富士苹果嫁接组合的2 年生幼树为试材，采用盆栽方法和碳氮双标记示踪技术，研究了5 个组合的生长特性及其对氮素的吸收、分配、利用特性和光合产物分配状况。结果表明：富士/平邑甜茶组合生长量最大、富士/东北山荆子组合生长量最小。富士/平邑甜茶组合对15N 的利用率最高，富士/楸子组合最低。15N 和13C 均主要分配在叶中，其次是1 年生...
以盆栽不饱满芽（春梢基部芽）、次饱满芽（秋梢芽）和饱满芽（春梢中部芽）‘嘎啦’苹果（Malus × domestica‘Gala’）/八棱海棠（Malus micromalus Makino）嫁接幼苗为试材，采用15N、13C双标记法，研究了其碳、氮营养分配特性。结果表明，新梢开始旺长期叶片13C 分配率不饱满芽幼苗 > 次饱满芽幼苗 > 饱满芽幼苗，分别为45.81%、42.49%、35.05%...
Effects of Two Different Training Methods on Dry Matter Partitioning and Translocation of 13C-Photosynthates in Young Trees of Japanese Pear ‘Gold Nijisseiki’
13C-assimilate fruit productivity number of scaffold pruning shoot growth
2009/7/8
Potted trees of 4-year-old ‘Gold Nijisseiki’ were used to compare two different training methods. The effects of 2-scaffolds and 5 or 6-scaffolds for young trees on the dry matter partitioning were st...
Distribution of 13C-photosynthates and Changes in Bleeding Rate under Waterlogged Conditions at Two Developmental Stages in Tomato Plants
bleeding carbohydrate excess moisture injury root translocation
2009/7/7
This study investigated causes of increased susceptibility to excess moisture injury during the fruit developmental stage compared with vegetative stage in tomato plants. Dry matter, distribution patt...