|Title:||豌豆產量生理研究(IV)莢果充實期間氮素與非構造性碳水化合物含量之變化||Other Titles:||Studies on the Yield Physiology of Garden Pea (Pisum sativum L.) Ⅳ. Status of Nitrogen and Total Nonstructural Carbohydrates of the Developing Pods||Authors:||陳阿善
|Keywords:||豌豆;莢果充實;氮素;非構造性碳水化合物;供源;積儲;pea Pisum sativum L.;pod-fill;Nitrogen;total nonstructural carbohydrates;source;sink||Issue Date:||Jun-1997||Publisher:||臺灣園藝學會||Journal Volume:||43||Journal Issue:||2||Start page/Pages:||115-125||Source:||中國園藝||Abstract:||
Pea cultivars Taichung 11, Taichung 12, Sugar Soap nod Dark Skinned Perfection, representing three different types of the crop, were grown in the fall crop of 1988. Flowers at the 20th to 23rd nodes from plant base were tagged at the day of blooming. Concentrations of total nitrogen (N) and total nonstructural carbohydrates (TNC) in different pod fractions were analyzed at intervals daring the period of pod-filling. Both the concentration and amount of N in the pod wall decreased from early pod development. The redistributed N from pod wall contributed to about 12% of teed N, which occurred mainly in the Inter tinge of pod-filling. The high seed N concentration during early pod development indicated that the relative rate of N accumulation by the seed was higher than that of TNC accumulation. The amount of TNC in the pod wall was low and was not considered as a major source of seed carbohydrate. The TNC/N ratio in the seed remained fairly constant during rapid seed-filling suggesting that the relative assimilation rates of starch and protein were comparable during this period. The high TNC/N ratio in the seed of Dark Skinned Perfection indicated that the balance between N supply and demand of this cultivar was restricted by the high N requirement of seed development. This wan proposed as one of the physiological factors causing the low yield potential of Dark Skinned Perfection under condition of the current experiment.
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