Effect of elevated CO₂ on phosphorus nutrition of phosphate-deficient Arabidopsis thaliana (L.) Heynh under different nitrogen forms.
Effect of elevated CO₂ on phosphorus nutrition of phosphate-deficient Arabidopsis thaliana (L.) Heynh under different nitrogen forms.
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DOI：
10.1093/jxb/ers341
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发表时间：
2013-01
影响因子：
6.9
通讯作者：
Zhang Y
中科院分区：
文献类型：
--
作者：
Niu Y;Chai R;Dong H;Wang H;Tang C;Zhang Y
磷(P)营养一直是植物对CO2升高反应的关键问题。然而，在不同的氮(N)形态下，二氧化碳的升高如何影响P的吸收尚不清楚。本研究研究了高浓度CO2（800µl l - 1）对拟南芥在ph缓冲缺磷（0.5µM）水培中吸收和利用磷的影响，并提供2mM硝酸盐（NO3−）或铵（NH4 +）。处理7 d后，CO2浓度升高提高了NO3−-和NH4 +供试植株的生物量，但降低了NH4 +供试植株的根单位重磷吸收量和茎部磷浓度。相比之下，CO2升高增加了根系每重磷的吸收量，提高了植株的磷浓度，缓解了NO3−供应植株的缺磷症状。CO2浓度升高还增加了缺磷植株的根/冠比、根总表面积和酸性磷酸酶活性，增加了磷吸收、分配和再动员相关基因或转录因子的表达。此外，CO2浓度升高使NO3−供试植株根系一氧化氮（NO）水平升高，而NH4 +供试植株根系一氧化氮（NO）水平降低。NO清除剂2-（4-羧基苯基）-4,4,5,5-四甲基咪唑啉-1-氧-3-氧化物（cPTIO）抑制植物根对P的吸收。综上所述，本研究得出结论，CO2和NO3−营养的增加可以诱导植物采取一系列适应策略，从缺磷的可溶性来源中改善磷状态，而NO可能是控制这些过程的信号分子。
Phosphorus (P) nutrition is always a key issue regarding plants responses to elevated CO2. Yet it is unclear of how elevated CO2 affects P uptake under different nitrogen (N) forms. This study investigated the influence of elevated CO2 (800 µl l–1) on P uptake and utilization by Arabidopsis grown in pH-buffered phosphate (P)-deficient (0.5 µM) hydroponic culture supplying with 2mM nitrate (NO3 −) or ammonium (NH4 +). After 7 d treatment, elevated CO2 enhanced the biomass production of both NO3 −- and NH4 +-fed plants but decreased the P amount absorbed per weight of roots and the P concentration in the shoots of plants supplied with NH4 +. In comparison, elevated CO2 increased the amount of P absorbed per weight of roots, as well as the P concentration in plants and alleviated P deficiency-induced symptoms of plants supplied with NO3 −. Elevated CO2 also increased the root/shoot ratio, total root surface area, and acid phosphatase activity, and enhanced the expression of genes or transcriptional factors involving in P uptake, allocation and remobilization in P deficient plants. Furthermore, elevated CO2 increased the nitric oxide (NO) level in roots of NO3 −-fed plants but decreased it in NH4 +-fed plants. NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) inhibited plant P acquisition by roots under elevated CO2. Considering all of these findings, this study concluded that a combination of elevated CO2 and NO3 − nutrition can induce a set of plant adaptive strategies to improve P status from P-deficient soluble sources and that NO may be a signalling molecule that controls these processes.
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影响因子：
11.6
作者：
Hamburger, D;Rezzonico, E;Poirier, Y
通讯作者：
Poirier, Y
影响因子：
7.3
作者：
Gojon, A;Dapoigny, L;Rufty, TW
通讯作者：
Rufty, TW
影响因子：
7.4
作者：
Aung, Kyaw;Lin, Shu-I;Chiou, Tzyy-Jen
通讯作者：
Chiou, Tzyy-Jen
影响因子：
5.6
作者：
Carlisle E;Myers S;Raboy V;Bloom A
通讯作者：
Bloom A
NO 合成酶产生的 NO 作用于生长素下游，调节缺铁诱导的根分枝，从而增强番茄植株的缺铁耐受性
影响因子：
6.9
作者：
Jin CW;Du ST;Shamsi IH;Luo BF;Lin XY
通讯作者：
Lin XY