不同品种美国山核桃嫁接苗光合特性比较

doi:10.3969/j.issn.1000-2006.2015.04.004

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南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (04): 19-25.doi: 10.3969/j.issn.1000-2006.2015.04.004

不同品种美国山核桃嫁接苗光合特性比较

何海洋^1,2,彭方仁^1,2*,张瑞^1,2,徐建南^1,2,吴斌³,李小飞^1,2,苏文川^1,2

1.南京林业大学南方现代林业协同创新中心,江苏南京 210037;
2.南京林业大学林学院,江苏南京 210037;
3.镇江市京口区农业委员会,江苏镇江 212014

出版日期:2015-07-31 发布日期:2015-07-31
基金资助:
收稿日期:2015-03-02 修回日期:2015-05-28基金项目:国家林业公益性行业科研专项项目(201304711); 江苏省林业三新工程项目[Lysx2014(047)]; 江苏高校优势学科建设工程资助项目(PAPD) 第一作者:何海洋,硕士生。*通信作者:彭方仁,教授。E-mail: frpeng@njfu.edu.cn。引文格式:何海洋,彭方仁,张瑞,等. 不同品种美国山核桃嫁接苗光合特性比较[J]. 南京林业大学学报:自然科学版,2015,39(4):19-25.

Photosynthetic characteristics of grafting plants of different pecan varieties

HE Haiyang^1,2, PENG Fangren^1,2*, ZHANG Rui^1,2, XU Jiannan^1,2, WU Bin³, LI Xiaofei^1,2, SU Wenchuan^1,2

1. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;
2. College of Forestry, Nanjing Forestry University, Nanjing 210037, China;
3. Jingkou District Agriculture Committee of Zhenjiang City, Zhenjiang 212014, China

Online:2015-07-31 Published:2015-07-31

摘要/Abstract

摘要： 为研究美国山核桃光合效率及不同品种间光合特性的差异,采用光合测定系统对6个美国山核桃优良品种‘Mahan’、‘Pawnee’、‘Wichita’、‘Stuart’、‘Sauber’、‘Jinhua’1年生嫁接苗净光合速率日变化、月份变化及光响应曲线进行了测定。结果表明:不同品种美国山核桃1年生嫁接苗净光合速率(P_n)日变化均呈不对称双峰曲线,但不同品种在不同月份的峰值大小及出现时间存在差异; ‘Mahan’、‘Pawnee’、‘Wichita’及‘Stuart’净光合速率变化呈双峰曲线,‘Sauber’月份变化呈单峰曲线; ‘Mahan’最大净光合速率(P_n,max)、光饱和点(L_SP)分别为16.5和1 065 μmol/(m²·s),显著高于其他品种,而光补偿点(L_CP)显著低于其他品种,表明‘Mahan’光适应范围大,对低光利用能力强,具有一定耐阴性; 各品种表观量子效率(A_QY)和暗呼吸速率(R_d)间差异不显著,不同品种光合效率排序为‘Mahan’>‘Jinhua’>‘Pawnee’>‘Wichita’>‘Sauber’>‘Stuart’; 相关性分析表明,最大净光合速率(P_n,max)与光饱和点(L_SP)呈极显著正相关,表观量子效率(A_QY)与光补偿点(L_CP)呈极显著负相关。

Abstract: In this study, the photosynthetic efficiency and differences of photosynthetic characteristics among different pecan varieties were evaluated. The photosynthetic characteristics and light response curves of six one-year-old pecan varieties, including ‘Mahan’, ‘Pawnee’, ‘Wichita’, ‘Stuart’, ‘Sauber’ and ‘Jinhua’, were measured with LI-6400 portable photosynthesis instrument. The results showed that the diurnal variation of net photosynthetic rate(P_n)of all these 6 pecan varieties showed asymmetric double peak curve. However, the peak value and the peak time of different varieties, were different. Monthly variation of the net photosynthetic rate of ‘Mahan’, ‘Pawnee’, ‘Wichita’ and ‘Stuart’ showed bimodal curve. However, ‘Sauber’ showed single curve. The maximum net photosynthetic rate(P_{n, max})and the light saturation point(L_SP)of ‘Mahan’ were the largest, 16.5 and 1 065 μmol/(m²·s), respectively, they were significantly higher than that of the other varieties. While the light compensation(L_CP)was significantly lower than that of the other varieties, indicating that ‘Mahan’ had better light adaptation, higher efficiency of using weak light and better shade tolerance. The differences of apparent quantum yield(A_QY)and dark respiration rate(R_d)among different pecan varieties were not significant. The photosynthetic capacity of different varieties was ‘Mahan’>‘Jinhua’> ‘Pawnee’> ‘Wichita’> ‘Sauber’> ‘Stuart’. This study showed that there were significant positive correlation between P_{n, max} and L_SP. While a significant negative correlation was found between A_QY and L_CP.

中图分类号:

S718.43

何海洋,彭方仁,张瑞,等. 不同品种美国山核桃嫁接苗光合特性比较[J]. 南京林业大学学报（自然科学版）, 2015, 39(04): 19-25.

HE Haiyang, PENG Fangren, ZHANG Rui, XU Jiannan, WU Bin, LI Xiaofei, SU Wenchuan. Photosynthetic characteristics of grafting plants of different pecan varieties[J].Journal of Nanjing Forestry University (Natural Science Edition), 2015, 39(04): 19-25.DOI: 10.3969/j.issn.1000-2006.2015.04.004.

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不同品种美国山核桃嫁接苗光合特性比较

Photosynthetic characteristics of grafting plants of different pecan varieties

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