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| 加勒比松、湿地松苗期生长及叶绿素荧光特性 |
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胡继文.,代莹.,李振,赵奋成,黄少伟,郭文冰
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1.广东省森林培育与保护利用重点试验室，广东省林业科学研究；2.华南农业大学,1.广东省森林培育与保护利用重点试验室，广东省林业科学研究；2.华南农业大学,1.广东省森林培育与保护利用重点试验室，广东省林业科学研究；2.华南农业大学,广东省森林培育与保护利用重点试验室，广东省林业科学研究,华南农业大学,广东省森林培育与保护利用重点试验室，广东省林业科学研究
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| 摘要: |
| 以加勒比松（Pinus caribaea）16 个种源、湿地松（P. elliottii）4 个种源 2.5 a 生营养袋苗木为
材料，定期开展生长调查，于 2016 年 7—8 月、2017 年 2 月开展叶绿素荧光参数的测定，分析加勒比松、
湿地松针叶叶绿素荧光参数对树种、种源、不同测量时间的响应。结果表明，不同种源加勒比松 / 湿地松
的株高、地径生长均存在显著差异（P<0.01）；测量时间与树种对最大 PSⅡ的光能转换效率（Fv/Fm）有
显著影响（P<0.01），二者互作效应不显著，与 7、8 月相比，测量值均在第 2 年 2 月显著提高；两个树
种的实际量子产量（ΦPSⅡ）、光化学淬灭（qP）与表观量子传递速率（ETR）对测量时间的响应模式相
反；加勒比松与湿地松叶绿素荧光参数受种源影响不显著；相关性分析表明，加勒比松与湿地松的株高
和地径生长与 2 月 Fv/Fm、PSⅡ有效光化学效率（Fv′ /Fm′）测量值呈一定的负相关关系；高光强抑制了
湿地松、加勒比松的叶绿素荧光参数，但抑制效果与生长无明显相关关系；低温造成的胁迫主要抑制了
加勒比松的光化学反应，并与其生长表现有一定的负相关关系。可考虑将 2 月份测量的叶绿素荧光参数
作为加勒比松耐寒个体的筛选指标。 |
| 关键词: 加勒比松 湿地松 生长 叶绿素荧光参数 |
| DOI： |
| 分类号: |
| 基金项目:国家林业局引进项目“加勒比松耐寒遗传资源及评价技术引进”(2013-4-39) |
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| The Growth and Chlorophyll Fluorescence Characteristics of Pinus caribaea and P. elliottii at the Seedling Stage |
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Hu Jiwen,Dai Ying,Li Zhen,Zhao Fencheng,Huang Shaowei and Guo Wenbing
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1. Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry; 2. South China Agricultural University,1. Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry; 2. South China Agricultural University,1. Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry; 2. South China Agricultural University,Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry,South China Agricultural University,Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry
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| Abstract: |
| The nutrition pot experiments of Pinus caribaea and P. elliottii (PEE) were conducted to
assess the response of chlorophyll(Chl) fluorescence parameters to different provenances and measured time.
The materials were potted seedlings from 16 P. caribaea provenances and 4 PEE provenances. The growth of
the seedlings and the Chl fluorescence parameters were measured in July and August 2016 and February 2017,
separately. The result showed there were significant differences among seedlings of different provenances in
height and diameter (P<0.01). The measured time and species had a significant effect on the value of the PSⅡ
maximal photochemical efficiency (Fv/Fm), while the interaction effect was not significant. The Fv/Fm was
higher in February 2017 than in July 2016 and August 2016; the response models of measured times of two species were opposite in the effective quantum yield (ΦPS Ⅱ ), the photochemical quenching coefficient (qP)
and the apparent electron transport rates (ETR). The Chl fluorescence parameters of two species were affected by
the measured times rather than provenances. The growth had a negative correlation with Fv/Fm and Fv′/Fm′ in
February 2017 in examined seedlings according to the correlation analysis. The Chl fluorescence parameters of P.
caribaea and PEE were inhibited by high light intensity, which might not affect the growth. The Chl fluorescence
parameters in P. caribaea were also inhibited by low temperature, which might be related to growth. The Chl
fluorescence parameters of P. caribaea in February 2017 might be indicators of chilling tolerance among P.
caribaea individuals. |
| Key words: Pinus caribaea Pinus elliottii growth traits chlorophyll fluorescence parameters |
