斑点性疾病が作物の収量に及ぼす影響について : 3. ソラマメにおける一場面

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From a pathophysiological point of view, following characters possessed by the broad bean (Vicia faba L.) appeared to show interrelationship with the effects of spotting of the leaves: a. the numbers of leaves and blossoms of a plant vary individually within its life period, but its period of blooming is limited between middle of April and early May; b. the plant must overwinter during its early stages of growth to produce fruit; and c. in early spring, numerous branches grow from the base of the stem. These branches and stem are capable of bearing fruits. Differentiation of the first flower bud occurs at this time. Experiments were performed to produce artificial spots on the leaves of the broad bean plant by applying aqueous solution of KCl0_3 at its various growth stages. Resultsobtained were as follows: 1. When the seedling of abroad bean plant was spotted at the time when the nutrients were being supplied from the endosperm, the yield of seed was greater than half of that of the untreated plant. When the nutrients from the endosperm became limited, the yield of seed was further reduced. When the nutrients of the endosperm were depleted and its carbohydrate assimliation was very faint, the yield of seed was markedly reduced. 2. When the broad bean plant was spotted immediately before overwintering, its growth was disturbed considerably, and resulted in no yield of seed. 3. When the bean plant was spotted during the winter, the damage was slight, and the yield was 80-l05% of the unspotted control. 4. When the bean plant was spotted early in spring at the time of differentiation of the first flower bud, about 50% yield was obtained. 5. When the bean plant was spotted during April and May at the time of flowering, there was no yield of seed. (Received March 29. l966)
日本植物病理学会の論文
1966-12-25

斑点性疾病が作物の収量に及ぼす影響について : 3. ソラマメにおける一場面

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