CAJ | 학술논문

　　以1年生南方泡桐四倍体及其二倍体南方泡桐为材料，采用Li-6400便携式光合作用仪测定其叶片的光合特性。结果表明：南方泡桐四倍体与其二倍体泡桐的光合特性规律一致，不同月份四倍体泡桐的净光合速率（ Pn）、气孔导度（Gs）、蒸腾速率（Tr）和胞间二氧化碳浓度（Ci）等均高于其二倍体。四倍体泡桐及其二倍体泡桐的净光合速率、气孔导度、蒸腾速率日变化，在5月、7月、9月和10月为单峰，6月和8月为双峰，胞间二氧化碳浓度为单谷变化。
　　이1년생남방포동사배체급기이배체남방포동위재료，채용Li-6400편휴식광합작용의측정기협편적광합특성。결과표명：남방포동사배체여기이배체포동적광합특성규률일치，불동월빈사배체포동적정광합속솔（ Pn）、기공도도（Gs）、증등속솔（Tr）화포간이양화탄농도（Ci）등균고우기이배체。사배체포동급기이배체포동적정광합속솔、기공도도、증등속솔일변화，재5월、7월、9월화10월위단봉，6월화8월위쌍봉，포간이양화탄농도위단곡변화。
The photosynthetic characteristics of one -year-old diploid and tetraploid Paulownia australis leaves were deter-mined by Li-6400 portable photosynthesis system .The results indicated that tetraploid Paulownia australis had the same photosyn-thetic rule as diploid Paulownia australis; but the net photosynthetic rate ( Pn ) , stomatal conductance ( Gs ) , transpiration rate (Tr) and intracellular CO2 concentration (Ci) of the former were higher than those of the latter in various months .The diurnal vari-ations in the Pn, Gs and Tr of both diploid and tetraploid Paulownia australis showed single-peak curve in May, July, September and October , but those were bimodal in June and August .The change in Ci revealed a single -valley curve .