Enhancement of 2-acetyl-1-pyrroline (2AP) concentration,total yield,and quality in fragrant rice through exogenous γ-aminobutyric acid (GABA) application |
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| Institution: | 1. Department of Crop science and Technology, College of Agriculture, South China Agricultural University, Guangzhou 510642, PR China;2. Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan;3. Department of Soil Science, MNSUA, Multan, Pakistan;1. College of Agriculture, South China Agricultural University, Guangzhou, 510642, Guangdong, China;2. Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture. PR China, Guangzhou, 510642, Guangdong, China;3. Department of Botany, University of Education (Lahore), Faisalabad-Campus, Faisalabad, 38000, Punjab, Pakistan;1. UMR Qualisud, Université de Montpellier, Place E. Bataillon, 34095 Montpellier Cedex 5, France;2. UMR Qualisud, CIRAD, 73 Rue J.F. Breton, 34398 Montpellier Cedex 5, France;3. Université de Montpellier, UMR DAP, Bat 15, CC 002, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France;4. University of Science and Technology of Hanoi, Department of Biotechnology and Pharmacology, Cau Giay, Hanoi, Viet Nam;5. UMR1083 Sciences pour l’Oenologie, INRA-SupAgro, 2 Place Viala, 34060 Montpellier, France;6. IBMM, UMR 5247, Université de Montpellier, CNRS, Bâtiment E, Faculté de Pharmacie, 15 Avenue Charles Flahault, BP 14491, 34093 Montpellier, France;7. University of Bonn, Institute of Nutritional and Food Sciences, Chair of Bioanalytics, Endenicher Allee 11-13, D 53115 Bonn, Germany;1. College of Biology and Pharmacy of Yulin Normal University, Yulin, 537000, PR China;2. Guangxi Key Laboratory of Agricultural Resources Chemistry and Biotechnology, Yulin, 537000, PR China |
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| Abstract: | The effects of exogenous application of γ-aminobutyric acid (GABA) on yield and quality characteristics, especially 2-acetyl-1-pyrroline (2AP) biosynthesis, are rarely investigated. Two field experiments, i.e., experiment 1 (EXP.1) and experiment 2 (EXP.2), were conducted, and four GABA levels, i.e., 0, 50, 500, 1000 mg l−1, classified as CK, T1, T2, and T3, respectively, were sprayed at the initial heading stage of a fragrant rice cultivar, Yuxiangyouzhan. The results showed that exogenous GABA application increased the 2AP content in grains 8.58%–19.44% in EXP.1 and 0.01%–6.22% in EXP.2. Exogenous GABA treatments also increased the GABA concentration in the grains and proline content in fragrant rice. Significant correlations between the grain 2AP content and proline content in leaves at 5 days after spraying were also detected in EXP.1, whereas GABA application did not significantly affect leaf dry weight, total dry weight, or grain yield. Moreover, gas exchange parameters, soil-plant analyses development values, and antioxidant activities were improved under GABA treatments. Additionally, the GABA applications substantially improved the grain quality characteristics, including milled rice percentage, head rice percentage, and protein content. Overall, exogenous GABA application was effective in the improvement of quality characteristics in fragrant rice, especially that of grain 2AP contents. |
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| Keywords: | γ-aminobutyric acid 2-Acetyl-1-pyrroline Fragrant rice Quality |
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