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Metabolic fingerprinting of water‐stressed soybean cultivars by gas chromatography, near‐infrared and UV ‐visible spectroscopy combined with chemometrics
Author(s) -
Uarrota Virgílio G.,
Segatto Cristiane,
Voytena Ana Paula L.,
Maraschin Marcelo,
Avila Linda Vásquez,
Kazama Daniele C. S.,
Coelho Cileide M. M.,
Souza Clovis Arruda
Publication year - 2019
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/jac.12311
Subject(s) - chemistry , stearic acid , food science , linoleic acid , organic chemistry , fatty acid
Aiming to assess the impact of water deficit on agronomic, photosynthetic and biochemical parameters of two soybean cultivars during reproductive stage, soybean plants were subjected to three gravimetric humidity levels. Water deficit decreased the leaf relative water content, leaf dry matter content, dried pod weight, grain weight, chlorophyll activity, linolenic acid, pentadecanoid and palmitoleic acid, and increased stearic, lauric, linoleic, myristic, oleic, palmitic and tricosanoic acids. Reactive oxygen species production and lipid peroxidation were accompanied by the activation of antioxidant defence system. Changes in aliphatic hydrocarbons, aromatic hydrocarbons, methyl, methylene, aromatic amine, polysaccharides, phenolics, carotenoids, proteins, C‐H aryl group, alkyl alcohols, polyamide, amide, ethers and esters, primary amide, N‐H secondary amine were observed. Principal component analysis and network correlations revealed dried shoot weight, malondihaldeyde, phenolics, proline, guaiacol peroxidase, stearic, tricosanoic, linoleic, oleic, palmitic, myristic and lauric acids as the most important variables related to water deficit. Cultivar CV 5959 was most tolerant than CV 5909. Despite the important variables found in this study, further research in data integration is needed for better understanding of the potential bio‐markers of water deficit and future development of its signalling pathways.