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Ideal Leaf Type on Leaf Shape and $\textrm{CO}_2$ Use Efficiency of Different Seed Size Cultivar in Soybean  

이강세 (군산대학교 자연과학대학)
전병무 (연변대학 장백산 천연자원보호.개발연구원)
김영진 (호남농업시험장)
국용인 (전남대학교 생물공학연구소)
박호기 (호남농업시험장)
박문수 (호남농업시험장)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.48, no.3, 2003 , pp. 243-247 More about this Journal
Abstract
To examine ideal leaf types with higher $\textrm{CO}_2$ assimilates and different seed sizes, 12 soybean varieties were planted on the pot in a plastic house covered with glass. Leaf function based on stomatal conductance and $\textrm{CO}_2$ assimilation in soybean is different in seed size and leaflet shape. Mean $\textrm{CO}_2$ assimilation of a single leaf was 19.66 $\mu\textrm{molm}^{-2}\textrm{s}^{-1}$ and showed higher in small seed cultivars with narrow leaflet than that of small seeds with wide leaflet (18.29 $\mu\textrm{molm}^{-2}\textrm{s}^{-1}$), but within large seed groups, it was higher in wide leaflets (19.17 $\mu\textrm{molm}^{-2}\textrm{s}^{-1}$) than narrow leaflet cultivars (17.45 $\mu\textrm{molm}^{-2}\textrm{s}^{-1}$). In small seed and narrow leaflet cultivars, stomatal conductance ranged from 0.14 to 0.15 $\mu\textrm{molm}^{-2}\textrm{s}^{-1}$, while $\textrm{CO}_2$ assimilation ranged from 19 to 20 $\mu\textrm{molm}^{-2}\textrm{s}^{-1}$. The Photosynthetic rate was closely related to stomatal conductance, transpiration and water use efficiency.
Keywords
soybean; $\textrm{CO}_2$ assimilation; stomatal conductance; narrow leaflet; wide leaflet;
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