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臭氧与干旱胁迫对盆架子和海南蒲桃幼苗荧光生理 的影响
叶龙华,易立飒,黄威龙,赖敏婷,莫云豹,张春花
广东省林业科技推广总站,广州市儿童公园,广州懒猫木阳台装饰工程有限公司,广东省林业科技推广总站,广东省林业科技推广总站,广东省林业科技推广总站
摘要:
以臭氧和干旱交叉胁迫下盆架子 Alstonia scholaris 和海南蒲桃 Syzygium hainanense 为研究对 象,测定其荧光参数变化,为华南地区选择抗逆树种提供参考。对 2 种幼苗进行人工臭氧熏气和干旱处 理后,用荧光仪测定其叶绿素荧光参数的动态。随着胁迫时间的延长,盆架子幼苗的最小初始荧光 F0 无 显著变化,海南蒲桃幼苗则呈上升趋势。盆架子幼苗的 Fv/Fm 呈下降趋势,海南蒲桃幼苗先升后降或波 动。E150 处理的两种幼苗的 PS Ⅱ实际光量子效率先降后升,其余处理的呈下降趋势。E20、E40+D 和 E150 处理的盆架子幼苗的 NPQ 显著上升后降,其余处理的盆架子幼苗和所有处理的海南蒲桃幼苗呈下降 趋势。研究表明,盆架子幼苗的抗臭氧或干旱能力强于海南蒲桃幼苗,适宜作为抗臭氧或干旱的树种。
关键词:  臭氧胁迫  干旱胁迫  盆架子  海南蒲桃  幼苗  荧光生理
DOI:
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基金项目:中央财政林业科技推广示范项目(2015-GDTK-07);广东省林业局资助项目( F09054)
Effects of Ozone and Drought on Fluorescence Physiology of Alstonia scholaris and Syzygium hainanense Seedlings
Ye Longhua,YI Lisa,HUANG Weilong,LAI Minting,MO Yunbao and ZHANG Chunhua1
Extension General Station of Forestry Science and Technology of Guangdong Province,Extension General Station of Forestry Science and Technology of Guangdong Province,Extension General Station of Forestry Science and Technology of Guangdong Province,Extension General Station of Forestry Science and Technology of Guangdong Province,Extension General Station of Forestry Science and Technology of Guangdong Province,Extension General Station of Forestry Science and Technology of Guangdong Province
Abstract:
This study was conducted to understand the fluorescent physiology under cross stress of ozone and drought in Alstonia scholaris and Syzygium hainanense seedlings in order to provide reference for choosing stress-resistant tree species in South China. A. scholaris and S. hainanense seedlings were treated with ozone fumigation and drought treatment,and then their chlorophyll fluorescence parameters were determined using fluorimeter. The results showed that with increasing treatment time, there was nosignificant change in minimal initial fluorescence (F0 ) for A. scholaris seedlings, whereas that of S. hainanense seedlings tended to increase. PSⅡ maximum photochemical efficiency (Fv /Fm) of A. scholaris seedlings tended to decrease, whereas that of S. hainanense increased followed by a decrease. Active quantum efficiency of PSII [Y(Ⅱ)] of the seedlings of two species treated with E150 decreased followed by an increase, whereas those treated with other methods tended to decrease. Non-photochemical quenching (NPQ) of A. scholaris seedlings treated with E20、E40+D and E150 increased followed by a decrease, whereas that treated with other methods and S. hainanense seedlingstreated with all methods tended to decrease.We concluded that the ability to resist ozone or drought of A. scholaris seedlings was stronger than S. hainanense seedlings.
Key words:  stress of ozone  stress of drought  Alstonia scholaris  Syzygium hainanense  seedlings  fluorescence physiology