Elevated CO2 Accelerates Phosphorus Depletion by Common Bean (Phaseolus vulgaris) in Association with Altered Leaf Biochemical Properties

Zhong MA; Jennifer FLYNN; Grant LIBRA; Zechuan SHI

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Elevated CO2 Accelerates Phosphorus Depletion by Common Bean (Phaseolus vulgaris) in Association with Altered Leaf Biochemical Properties

机译：升高的二氧化碳会加速普通豆（菜豆）与叶片生化特性改变相关的磷消耗

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Phosphorus (P) is a major limiting factor for plant productivity in many ecosystems and agriculture.The projected increase in atmospheric CO2 is likely to result in changes in plant mineral consumption and growth.We studied P depletion by common bean (Phaseolus vulgaris) cultured hydroponically under ambient (377 ± 77 μmol mol-1) or elevated (650 ± 32 μmol mo1-1) CO2 in media of low or high P.Under elevated CO2 compared to ambient CO2,the maximum P depletion rate increased by 98％ at low P and 250％ at high P,and P was depleted about 2-5 weeks sooner;leaf acid phosphatase (APase) activity and chlorophyll content both increased significantly;root-to-shoot ratio increased significantly at high P,although it was unaffected at low P;lateral root respiration rate showed no change,suggesting that CO2 did not affect P depletion via metabolic changes to the roots;the total biomass at final harvest was significantly higher at both low and high P.Our data showed that the increased rate and amount of P depletion during plant growth under elevated CO2 occurred in association with alterations in leaf biochemical properties,i.e.,enhanced activities of leaf APase and increased leaf chlorophyll content.

机译：磷（P）是许多生态系统和农业中植物生产力的主要限制因素，预计大气中CO2的增加可能会导致植物矿物质消耗和生长的变化。我们研究了水培栽培的普通豆（Phaseolus vulgaris）对P的消耗在低或高P介质中在环境（377±77μmolmol-1）或升高（650±32μmolmo1-1）的CO2下。与环境CO2相比，在升高的CO2下，低磷下最大P消耗率提高了98％高磷条件下磷和250％，磷提前约2-5周耗尽;高磷条件下叶酸磷酸酶（APase）活性和叶绿素含量均显着增加;根冠比明显增加，但在高磷条件下不受影响。低磷;侧根呼吸速率没有变化，表明CO2不会通过根部代谢变化影响磷的消耗;低磷和高磷条件下最终收割时的总生物量均显着较高。数量CO 2浓度升高导致植物生长过程中P耗竭的变化与叶片生化特性的改变有关，即叶片APase活性增强和叶片叶绿素含量增加。

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来源
《土壤圈（英文版）》 |2018年第3期|422-429|共8页
作者
Zhong MA; Jennifer FLYNN; Grant LIBRA; Zechuan SHI;
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Department of Biology, Truman State University, Kirksville MO 63501(USA);

Department of Biology, Truman State University, Kirksville MO 63501(USA);

Department of Biology, Truman State University, Kirksville MO 63501(USA);

Department of Biology, Truman State University, Kirksville MO 63501(USA);

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
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Elevated CO2 Accelerates Phosphorus Depletion by Common Bean (Phaseolus vulgaris) in Association with Altered Leaf Biochemical Properties

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