ダイズ葉同化速度の品種間差異の生ずる機作 : 初生葉における同化速度と葉身の面積生体重およびRuDPカーボキシレース活性との関係(予報)

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概要

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• Leaf fresh weight per unit area (FW/dm^2) was already reported to be significantly correlative with photosynthetic rate (P/dm^2) in upper leaves, but it became less correlative as leaf position lowered to end in non-correlative in primary leaves. The experiment was carried out to confirm the above mentioned result with primary leaves and also to get the information about RuDP carboxylase activity (RuDPact/FW) in primary leaves. The results, including the informations about upper leaves, were summarized as follows. 1. P/dm^2 was devided into the following two components : P/dm^2=FW/dm^2×P/FW. where P/FW is photosynthetic rate per unit fresh weight of leaves. In primary leaves, FW/dm^2 was again non-correlative with P/dm^2,but P/FW was highly and significantly correlative. Significant correlation between P/dm^2 and RuDPact/FW supported the relationship between P/dm^2 and P/FW. 2. As leaf position decame higher, leaves tended to be thinner and the correlation coefficient between P/dm^2 and FW/dm^2 got higher. The coefficient between P/dm^2 and P/FW, on the contrary, got lower. This was confirmed also by the change of coefficient between P/dm^2 and RuDPact/FW. 3. In lower leaves, photosynthetic activity per unit amount of leaf mesophyll seems to be an important factor for varietal differences in photosynthetic rate. In upper leaves, on the contrary, amount of leaf mesophyll per unit leaf area becomes more important. In the breeding of soybean plant for higher photosynthetic rate, FW/dm^2 of upper leaves may be used as a character for selection.

• 日本作物学会の論文
• 1978-02-01

著者

• 渡辺 巌

  東北農業試験場

• 渡辺 巌

  農林水産技術会議

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• ダイズ葉同化速度の品種間差異の生ずる機作 : 初生葉における同化速度と葉身の面積生体重およびRuDPカーボキシレース活性との関係(予報)

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