摘要
为了了解不同基因型斑兰叶(Pandanus amaryllifolius Roxb)光合生理特性与环境因子的相关性,采用LI-6400XT光合作用测定系统,在自然环境条件下测定了不同斑兰叶植株的光合日变化.结果表明不同斑兰叶的净光合速率(Pn)、蒸腾速率(Tr)和气孔导度(Gs)日变化均呈单峰曲线,其中大叶斑兰的Pn、Tr和Gs值均高于斑兰叶的Pn、Tr和Gs值,大叶斑兰的Pn与Gs值均在1300时达到最高值,分别为12.98μmol·m^-2·s^-1与0.41μmol·m^-2·s^-1,而斑兰叶则在1100时达到最高值,分别为5.55μmol·m^-2·s^-1与0.11μmol·m^-2·s^-1,两者的Tr值在1300时均达到最高值,大叶斑兰为3.37μmol·m^-2·s^-1,斑兰叶为1.47μmol·m^-2·s^-1,并且两者的Pn与Tr、Gs呈极显著正相关;大叶斑兰的水分利用率(WUE)日变化呈不断下降的趋势,斑兰叶呈先上升后下降的趋势,斑兰叶WUE值继续上升,在1500时达到最高值4.96μmol·m^-2·s^-1,并高于大叶斑兰,斑兰叶的WUE与Pn显著正相关,大叶斑兰无相关性;大叶斑兰的胞间隙CO2含量(Ci)日变化呈不断上升趋势,斑兰叶呈先上升后下降然后再上升的趋势,在1900时两者都上升到最高值,斑兰叶为561.04μmol·m^-2·s^-1,大叶斑兰为378.15μmol·m^-2·s^-1;大叶斑兰的气孔阻止值(SLR)日变化呈不断下降趋势,斑兰叶呈先下降后上升然后再下降的趋势,至1500时达最高值0.37μmol·m^-2·s^-1,1300至1700期间斑兰叶的SLR值都高于大叶斑兰的SLR值.另外,环境因子中的空气相对湿度(RH-H)与Pn极显著正相关,大气CO2浓度(Ca)与Pn极显著负相关.综上所述,大叶斑兰和斑兰叶均适宜种植在阴暗湿润的环境下,虽然大叶斑兰具有比斑兰叶更强的光合能力,但斑兰叶的水分利用率要强于大叶斑兰的水分利用率,并具有更强的生长潜力.
In the report,in order to understand the correlation among photosynthetic physiological characteristics and environmental factors of different species of Pandanus amaryllifolius Roxb,the LI-6400XT photosynthesis system was used to determine the photosynthetic diurnal variation of different species of P.amaryllifolius under natural environmental conditions for breeding and scientific cultivation provide a theoretical basis.The results showed that the net photosynthetic rate(Pn),transpiration rate(Tr),and stomatal conductance(Gs)of the different species show a single-peak curve,and the Pn,Tr,and Gs values of Pandanus sp are higher than P.amaryllifolius,the Pn and Gs values of Pandanus sp reached the highest values are 12.98μmol·m^-2·s^-1 and 0.41μmol·m^-2·s^-1 at 13:00,while P.amaryllifolius reached the highest values are 5.55μmol·m^-2·s^-1 and 0.11μmol·m^-2·s^-1 at 11:00,both of which reached the highest value at 13:00,and Pandanus sp was 3.37μmol·m^-2·s^-1,P.amaryllifolius showed 1.47μmol·m^-2·s^-1,and there was a significant positive correlation between Pn of both and Tr and Gs;the daily variation of water use efficiency(WUE)of Pandanus sp showed a downward trend,P.amaryllifolius firstly increased and then decreased.The WUE value of P.amaryllifolius continued to rise,reaching a maximum value of 4.96μmol·m^-2·s^-1 at 15:00,and which were higher than that of the Pandanus sp,there was a significant positive correlation between the WUE of P.amaryllifolius and Pn,while there was no correlation between the WUE of Pandanus sp and Pn.The diurnal variation of CO2 content(Ci)in Pandanus sp showed an increasing trend,P.amaryllifolius increased firstly,then decreased and then increased,both rose to the highest value at 19:00,and P.amaryllifolius was 561.04μmol·m^-2·s^-1,Pandanus sp was 378.15μmol·m^-2·s^-1;The daily variation of the stomata prevention value(SLR)of the P.sp showed a decreasing trend,P.amaryllifoliusfirst decreased and then increased after decreased,the SLR value of P.amaryllifolius firstly increased and then decreased,reaching a maximum value of 0.37μmol·m^-2·s^-1 at 15:00,the SLR values of P.amaryllifolius were higher than that of Pandanus sp from 13:00 to 17:00.Additionally,there was a significant positive correlation between the relative humidity(RH-H)in the environmental factors and Pn,while there was a significant negative correlation between atmospheric CO2 concentration(Ca)and Pn.In summary,P.amaryllifolius is suitable for planting in a humid and ventilated environment.Although Pandanus sp has stronger photosynthetic capacity than P.amaryllifolius,the water use efficiency and growth potential of P.amaryllifolius are stronger than that of the Pandanus sp.
作者
郭培培
吉训志
秦晓威
黄志
郝朝运
鱼欢
陈思平
Guo Peipei;Ji Xunzhi;Qin Xiaowei;Huang Zhi;Hao Chaoyun;Yu Huan;Chen Siping(College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China;Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning 571533, China;Key Laboratory of Genetic Resources Utilization of Spice and Beverage Crops, Ministry of Agriculture, Wanning 571533, China;Hainan Provincial Key Laboratory of Genetic Improvement and Quality Regulation for Tropical Spice and Beverage Crops, Wanning 571533, China)
出处
《海南大学学报（自然科学版）》
CAS
2020年第1期52-58,共7页
Natural Science Journal of Hainan University
基金
香露兜新食品原料安全风险评估(1630142018014)
农业部“一带一路”热带农业资源联合研究专项课题(BARTP-03-HCY)。
关键词
斑兰叶
基因型
环境因子
光合特性
Pandanus amaryllifolius Roxb
genetype
environmental factors
photosynthetic rate
