High-nitrogen and low-irradiance can restrict energy utilization in photosynthesis of successional tree species in low subtropical forest
High-nitrogen and low-irradiance can restrict energy utilization in photosynthesis of successional tree species in low subtropical forest
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高氮低照度限制低亚热带森林演替树种光合作用能量利用
DOI：
10.1007/s11427-008-0077-x
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发表时间：
2008-07
期刊：
影响因子：
--
通讯作者：
Zhao P
中科院分区：
文献类型：
--
作者：
Zeng XP;Cai XA;Sun GC;Zhao P
采用co2交换系统和叶绿素荧光方法，研究了亚热带森林3种优势树种，即日光植物或早期演替种超级中国、中游植物或中期演替种苦参和耐阴植物或晚期演替种隐果，叶片光合作用和能量利用分配对高氮输入和高光强的响应。结果表明，在不同植物种类中，高氮高辐照（HNHL）植物的净光合速率（Pn）高于低氮高辐照（LNHL）植物，表明低氮输入会限制高辐照下植物的光合速率。而高供氮低辐照（HNLL）植株pn值较低。赤豆HNHL、LNHL和HNLL植株叶片的开膜量子产率（Fv′/Fm′）变化不显著。superbaandC。而hhl株的fv′/Fm′较高。与LNHL或HNLL电厂的比较。c的HNHL工厂。与LNHL或HNLL植株相比，conconna植株的光化学量子产率（ΔF/Fm’）也更高，但在s植株中没有发现类似的反应。superbaandC。hystrix (P < 0.05)。在0 ~ 2000 μmol光子·m−2·s−1辐照度范围内，LNHL植物光化学消耗的能量（ϕPSII）为18.2%。（P<0.05），显著高于HNHL植株（P<0.05）。hystrix1对氮气供应和辐照度也有类似的反应。无论何种植物，HNLL植物都具有显著的ϕ psii和较高的光热耗散，且这种影响在国际上更为严重。superbaorC。hystrix。这可能意味着氮沉积的高氮输入和气候变化或空气污染引起的低辐照度更严重地限制了晚演替物种的光合作用过程。早期演替物种的担忧。超带和中演替种。hystrix。未来持续的高氮降水和过度的雾霾或污染烟雾可能导致后期演替物种的退化，而早期演替物种更适应争夺更多资源以保持其在生态系统中的优势地位。从这个意义上说，地带性植被可能会加速高氮降水和低辐射造成的退化，而早期演替和中植物植被可以维持更长时间。因此，氮降水可能在植物群落演替中起重要作用。
Responses of photosynthesis and the partition of energy utilization to high-nitrogen importation and high-light intensity in leaves of three dominant tree species of subtropical forest, including sun plant or early-successional speciesSchima superba, mesophyte or intermediate-successional speciesCanstanopsis hystrix, and shading-tolerant plant or late-successional speciesCryptocarya concinnawere studied by using the CO2exchange system and chlorophyll fluorescence method. Our results showed that, regardless of plant species, net photosynthetic rate (Pn) was higher in high-nitrogen supply and high irradiance (HNHL) plants than in low-nitrogen supply and high irradiance (LNHL) plants, implying that low-nitrogen importation would limitPnof plants grown under high irradiance. However, high-nitrogen supply and low irradiance (HNLL) plants had a lowerPn. Insignificant change of quantum yield (Fv′/Fm′) in opened PS II was found in leaves of HNHL, LNHL or HNLL plants ofS. superbaandC. hystrix, while a higherFv′/Fm′ occurred in HNHL plants ofC. concinnain comparison with LNHL or HNLL plants. The HNHL plants ofC. concinnaalso had a higher photochemical quantum yield (ΔF/Fm′) than LNHL or HNLL plants, however no similar responses were found in plants ofS. superbaandC. hystrix(P<0.05). In the irradiance range of 0–2000 μmol photon·m−2·s−1, the fraction of energy consumed by photochemistry (ϕPSII) was 18.2% in LNHL plants ofS. superbawhich was higher than that in HNHL plants (P>0.05) and it was significantly higher than in HNLL plants (P<0.05).C. hystrixalso had a similar response inϕPSIIto nitrogen supply and irradiance. Regardless of species HNLL plants had a significantϕPSIIand higher heat dissipation in light, and this effect was more severe inC. concinnathan inS. superbaorC. hystrix. The results may mean that high-nitrogen importation by nitrogen deposit and low irradiance caused by changing climate or air pollution would more severely restrict photosynthetic processes in the late-successional speciesC. concinnathan in the early-successional speciesS. superbaand intermediate-successional speciesC. hystrix. The continuous high-nitrogen precipitation in the future and the over cast mist or pollution smoke could induce late-successional species to degrade, however, early-successional species would be more adapted to competition for more resources to keep their dominance in ecosystems. In this sense, the zonal vegetation may accelerate degradation caused by high nitrogen precipitation and low irradiance, while the early-successional and mesophytic vegetations can remain longer. Thus, nitrogen precipitation may play an important role in plant community succession.
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DOI：
10.1007/0-306-48135-9_4
发表时间：
1996
期刊：
--
影响因子：
--
作者：
B. Andersson;J. Barber
通讯作者：
B. Andersson;J. Barber
影响因子：
--
作者：
Zhou Guo
通讯作者：
Zhou Guo
DOI：
--
发表时间：
2011-12
期刊：
Advance Journal of Food Science and Technology
影响因子：
--
作者：
O. Lange;P. S. Nobel;C. Osmond;H. Ziegler
通讯作者：
O. Lange;P. S. Nobel;C. Osmond;H. Ziegler
影响因子：
7.4
作者：
HARBINSON, J;GENTY, B;BAKER, NR
通讯作者：
BAKER, NR
影响因子：
8.9
作者：
Galloway, JN
通讯作者：
Galloway, JN