CAJ | 학술논문

为了揭示自然条件下不同种源木棉在广州地区的生长和光合特性的差异，以海南昌江、广东广州、广东揭阳、福建厦门、四川攀枝花、云南红河州和云南景洪7个种源的木棉1年生苗为研究对象，测定其生长性状、叶片光合特性指标和CO2响应曲线。结果表明：在一定范围内增加CO2浓度，净光合速率（ Pn ）逐渐增大直至趋于稳定，不同种源木棉CO2曲线特征参数有一定差异，但未达显著水平；7个种源木棉的CO2补偿点（CCP）在61．41～77?68μmol／mol之间，CO2饱和点（CSP）在667．98～860．58μmol／mol之间。不同种源木棉的株高和气孔交换系数差异显著（ P＜0．05），表明不同种源间的长势和光合能力有较大差别；相关性分析表明株高与种源的Pn呈显著正相关，表明Pn可作为选取种源的参考指标。
위료게시자연조건하불동충원목면재엄주지구적생장화광합특성적차이，이해남창강、엄동엄주、엄동게양、복건하문、사천반지화、운남홍하주화운남경홍7개충원적목면1년생묘위연구대상，측정기생장성상、협편광합특성지표화CO2향응곡선。결과표명：재일정범위내증가CO2농도，정광합속솔（ Pn ）축점증대직지추우은정，불동충원목면CO2곡선특정삼수유일정차이，단미체현저수평；7개충원목면적CO2보상점（CCP）재61．41～77?68μmol／mol지간，CO2포화점（CSP）재667．98～860．58μmol／mol지간。불동충원목면적주고화기공교환계수차이현저（ P＜0．05），표명불동충원간적장세화광합능력유교대차별；상관성분석표명주고여충원적Pn정현저정상관，표명Pn가작위선취충원적삼고지표。
The growth traits, photosynthetic characteristics and the response of photosynthesis rate to CO2 concentration were measured for revealing the differences in growth and photosynthetic in one year old seedlings of Bombax ceiba from seven different provenances, including Changjiang of Hainan, Guangzhou and Jieyang of Guangdong, Xiamen of Fujian, Panzhihua of Sichuan, Honghezhou and Jinghong of Yunnan. The results indicated that net photosynthetic rate ( Pn ) of B. ceiba rose as CO2 concentration increased in a specific range, the photosynthetic-CO2 response parameters were dif?ferent to some extent among different provenances, but the difference was not significant. The CO2 compensation point (CCP)and the CO2 saturation point(CSP)was 61.41-77.68 and 667.98-860.58 μmol/mol, respectively. There were significant difference( P<0.05) in height and the gas exchange parameters, which showed a relatively high difference of growth and photosynthetic characteristics among provenances, correlation analysis showed that plant height was signifi?cantly and positively related to Pn among provenances, indicating Pn could be used as a reference index for choosing provenance.