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|Table of Contents|

不同品种美国山核桃嫁接苗光合特性比较(PDF/HTML)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年04期
Page:
19-25
Column:
专题报道
publishdate:
2015-07-20

Article Info:/Info

Title:
Photosynthetic characteristics of grafting plants of different pecan varieties
Article ID:
1000-2006(2015)04-0019-07
Author(s):
HE Haiyang12 PENG Fangren12* ZHANG Rui12 XU Jiannan12 WU Bin3 LI Xiaofei12 SU Wenchuan12
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
Keywords:
Carya illinoensis grafting plants photosynthetic characteristics light response curve correlation analysis
Classification number :
S718.43
DOI:
10.3969/j.issn.1000-2006.2015.04.004
Document Code:
A
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(Pn)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(Pn, max)and the light saturation point(LSP)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(LCP)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(AQY)and dark respiration rate(Rd)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 Pn, max and LSP. While a significant negative correlation was found between AQY and LCP.

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Last Update: 2015-07-31