Phosphite treatment can improve root biomass and nutrition use efficiency in wheat.
Phosphite treatment can improve root biomass and nutrition use efficiency in wheat.
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DOI：
10.3389/fpls.2022.1017048
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发表时间：
2022
影响因子：
5.6
通讯作者：
中科院分区：
文献类型：
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作者：
亚磷酸盐代表磷酸盐的还原形式，属于一类被称为生物刺激剂的作物生长促进化学品。以往的研究表明，亚磷酸盐的应用可以促进根系生长，但其潜在的机制，特别是在环境胁迫下，仍然是难以捉摸的。为了揭示这一点，我们进行了一系列的形态和生理分析，营养，水分和热胁迫下叶面喷施小麦。利用X射线计算机断层扫描技术直接在土壤中对根系结构进行非侵入性三维成像，结果表明，亚磷酸盐处理改善了根系结构特征，增加了根系生物量。生理生化分析表明，亚磷酸盐处理显著提高了硝酸还原酶（NR）活性、叶片光合作用和气孔导度，分别提高了氮和碳的同化作用。这些差异在高温或干旱处理（光合作用和光系统II稳定性）和养分缺乏（根性状和NR）下更为明显。总的来说，我们的研究结果表明，亚磷酸盐处理通过改善氮和碳同化，结合改善根系生长，这可能会提高生物量和产量，提高植物的耐受非生物胁迫的能力。
Phosphite represents a reduced form of phosphate that belongs to a class of crop growth-promoting chemicals termed biostimulants. Previous research has shown that phosphite application can enhance root growth, but its underlying mechanism, especially during environmental stresses, remains elusive. To uncover this, we undertook a series of morphological and physiological analyses under nutrient, water and heat stresses following a foliar application in wheat. Non-invasive 3D imaging of root system architecture directly in soil using X-ray Computed Tomography revealed that phosphite treatment improves root architectural traits and increased root biomass. Biochemical and physiological assays identified that phosphite treatment significantly increases Nitrate Reductase (NR) activity, leaf photosynthesis and stomatal conductance, suggesting improved Nitrogen and Carbon assimilation, respectively. These differences were more pronounced under heat or drought treatment (photosynthesis and photosystem II stability) and nutrient deficiency (root traits and NR). Overall our results suggest that phosphite treatment improves the ability of plants to tolerate abiotic stresses through improved Nitrogen and Carbon assimilation, combined with improved root growth which may improve biomass and yield.
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影响因子：
16.6
作者：
Bhosale R;Giri J;Pandey BK;Giehl RFH;Hartmann A;Traini R;Truskina J;Leftley N;Hanlon M;Swarup K;Rashed A;Voß U;Alonso J;Stepanova A;Yun J;Ljung K;Brown KM;Lynch JP;Dolan L;Vernoux T;Bishopp A;Wells D;von Wirén N;Bennett MJ;Swarup R
通讯作者：
Swarup R
影响因子：
5.6
作者：
Brown P;Saa S
通讯作者：
Saa S
影响因子：
2.6
作者：
Fleming, Thomas R.;Fleming, Colin C.;Liu, Fuquan
通讯作者：
Liu, Fuquan
影响因子：
2
作者：
Ho, MD;McCannon, BC;Lynch, JP
通讯作者：
Lynch, JP
影响因子：
16.6
作者：
Giri J;Bhosale R;Huang G;Pandey BK;Parker H;Zappala S;Yang J;Dievart A;Bureau C;Ljung K;Price A;Rose T;Larrieu A;Mairhofer S;Sturrock CJ;White P;Dupuy L;Hawkesford M;Perin C;Liang W;Peret B;Hodgman CT;Lynch J;Wissuwa M;Zhang D;Pridmore T;Mooney SJ;Guiderdoni E;Swarup R;Bennett MJ
通讯作者：
Bennett MJ