Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage
Abstract Background Nitrogen (N) metabolism plays an important role in plant drought tolerance. 2-(3,4-Dichlorophenoxy) triethylamine (DCPTA) regulates many aspects of plant development; however, the effects of DCPTA on soil drought tolerance are poorly understood, and the possible role of DCPTA on...
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| Format: | Article |
| Language: | English |
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BMC
2019-03-01
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| Series: | BMC Plant Biology |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12870-019-1710-5 |
| _version_ | 1819149815393550336 |
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| author | Tenglong Xie Wanrong Gu Mingquan Wang Liguo Zhang Congfeng Li Caifeng Li Wenhua Li Lijie Li Shi Wei |
| author_facet | Tenglong Xie Wanrong Gu Mingquan Wang Liguo Zhang Congfeng Li Caifeng Li Wenhua Li Lijie Li Shi Wei |
| author_sort | Tenglong Xie |
| collection | DOAJ |
| description | Abstract Background Nitrogen (N) metabolism plays an important role in plant drought tolerance. 2-(3,4-Dichlorophenoxy) triethylamine (DCPTA) regulates many aspects of plant development; however, the effects of DCPTA on soil drought tolerance are poorly understood, and the possible role of DCPTA on nitrogen metabolism has not yet been explored. Results In the present study, the effects of DCPTA on N metabolism in maize (Zea mays L.) under soil drought and rewatering conditions during the pre-female inflorescence emergence stage were investigated in 2016 and 2017. The results demonstrated that the foliar application of DCPTA (25 mg/L) significantly alleviated drought-induced decreases in maize yield, shoot and root relative growth rate (RGR), leaf relative water content (RWC), net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr), and nitrate (NO3 −), nitrite (NO2 −), soluble protein contents, and nitrate reductase (NR), nitrite reductase (NiR), isocitrate dehydrogenase (ICDH), alanine aminotransferase (AlaAT) and aspartate aminotransferase (AspAT) activities. In addition, the foliar application of DCPTA suppressed the increases of intercellular CO2 concentration (Ci), ammonium (NH4 +) and free amino acid contents, and the glutamate dehydrogenase (GDH) and protease activities of the maize. Simultaneously, under drought conditions, the DCPTA application improved the spatial and temporal distribution of roots, increased the root hydraulic conductivity (Lp), flow rate of root-bleeding sap and NO3 − delivery rates of the maize. Moreover, the DCPTA application protected the chloroplast structure from drought injury. Conclusions The data show, exogenous DCPTA mitigates the repressive effects of drought on N metabolism by maintained a stabilized supply of 2-oxoglutarate (2-OG) and reducing equivalents provided by photosynthesis via favorable leaf water status and chloroplast structure, and NO3 − uptake and long-distance transportation from the roots to the leaves via the production of excess roots, as a result, DCPTA application enhances drought tolerance during the pre-female inflorescence emergence stage of maize. |
| first_indexed | 2024-12-22T14:07:36Z |
| format | Article |
| id | doaj.art-83a092bc45e74dc99d5b30167aa5be3c |
| institution | Directory Open Access Journal |
| issn | 1471-2229 |
| language | English |
| last_indexed | 2024-12-22T14:07:36Z |
| publishDate | 2019-03-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Plant Biology |
| spelling | doaj.art-83a092bc45e74dc99d5b30167aa5be3c2022-12-21T18:23:16ZengBMCBMC Plant Biology1471-22292019-03-0119112010.1186/s12870-019-1710-5Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stageTenglong Xie0Wanrong Gu1Mingquan Wang2Liguo Zhang3Congfeng Li4Caifeng Li5Wenhua Li6Lijie Li7Shi Wei8College of Agriculture, Northeast Agricultural UniversityCollege of Agriculture, Northeast Agricultural UniversityMaize Research Institute, Heilongjiang Academy of Agricultural SciencesMaize Research Institute, Heilongjiang Academy of Agricultural SciencesInstitute of Crop Science, Chinese Academy of Agricultural SciencesCollege of Agriculture, Northeast Agricultural UniversityMaize Research Institute, Heilongjiang Academy of Agricultural SciencesCollege of Agriculture, Northeast Agricultural UniversityCollege of Agriculture, Northeast Agricultural UniversityAbstract Background Nitrogen (N) metabolism plays an important role in plant drought tolerance. 2-(3,4-Dichlorophenoxy) triethylamine (DCPTA) regulates many aspects of plant development; however, the effects of DCPTA on soil drought tolerance are poorly understood, and the possible role of DCPTA on nitrogen metabolism has not yet been explored. Results In the present study, the effects of DCPTA on N metabolism in maize (Zea mays L.) under soil drought and rewatering conditions during the pre-female inflorescence emergence stage were investigated in 2016 and 2017. The results demonstrated that the foliar application of DCPTA (25 mg/L) significantly alleviated drought-induced decreases in maize yield, shoot and root relative growth rate (RGR), leaf relative water content (RWC), net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr), and nitrate (NO3 −), nitrite (NO2 −), soluble protein contents, and nitrate reductase (NR), nitrite reductase (NiR), isocitrate dehydrogenase (ICDH), alanine aminotransferase (AlaAT) and aspartate aminotransferase (AspAT) activities. In addition, the foliar application of DCPTA suppressed the increases of intercellular CO2 concentration (Ci), ammonium (NH4 +) and free amino acid contents, and the glutamate dehydrogenase (GDH) and protease activities of the maize. Simultaneously, under drought conditions, the DCPTA application improved the spatial and temporal distribution of roots, increased the root hydraulic conductivity (Lp), flow rate of root-bleeding sap and NO3 − delivery rates of the maize. Moreover, the DCPTA application protected the chloroplast structure from drought injury. Conclusions The data show, exogenous DCPTA mitigates the repressive effects of drought on N metabolism by maintained a stabilized supply of 2-oxoglutarate (2-OG) and reducing equivalents provided by photosynthesis via favorable leaf water status and chloroplast structure, and NO3 − uptake and long-distance transportation from the roots to the leaves via the production of excess roots, as a result, DCPTA application enhances drought tolerance during the pre-female inflorescence emergence stage of maize.http://link.springer.com/article/10.1186/s12870-019-1710-5MaizeSoil drought2-(3,4-Dichlorophenoxy) triethylamineYieldNitrogen metabolism |
| spellingShingle | Tenglong Xie Wanrong Gu Mingquan Wang Liguo Zhang Congfeng Li Caifeng Li Wenhua Li Lijie Li Shi Wei Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage BMC Plant Biology Maize Soil drought 2-(3,4-Dichlorophenoxy) triethylamine Yield Nitrogen metabolism |
| title | Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage |
| title_full | Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage |
| title_fullStr | Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage |
| title_full_unstemmed | Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage |
| title_short | Exogenous 2-(3,4-Dichlorophenoxy) triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre-female inflorescence emergence stage |
| title_sort | exogenous 2 3 4 dichlorophenoxy triethylamine ameliorates the soil drought effect on nitrogen metabolism in maize during the pre female inflorescence emergence stage |
| topic | Maize Soil drought 2-(3,4-Dichlorophenoxy) triethylamine Yield Nitrogen metabolism |
| url | http://link.springer.com/article/10.1186/s12870-019-1710-5 |
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