8 research outputs found
Drought response of rice in Northeastern Thailand assessed via fourier transform infrared spectroscopy
Drought is a major constraint in many rainfed areas and affects rice yield. We
aimed to characterize the physiological changes in rice in response to drought
using Fourier transform infrared (FTIR) spectroscopy. Eighty rice landrace
seedlings were subjected to drought in the greenhouse using a PEG 6000.
Physiological parameters, including total chlorophyll content, relative water
content, electrolyte leakage, and biochemical changes were evaluated. Based on
the FTIR results, the landraces were divided into three main groups: tolerant,
moderately tolerant, and susceptible. Principal component analysis revealed
spectral differences between the control and drought stress treatment groups.
Lipid, pectin, and lignin content increased after drought stress. The biochemical
components of plants at different drought tolerance levels were also compared.
The lipid (CH2 and CH3), lignin (C=C), pectin (C=O), and protein (C=O, N–H)
contents were the highest in the drought-tolerant cultivars, followed by the
moderately tolerant and susceptible cultivars, respectively. Cultivar 17 and 49 were
the most tolerant, and the functional groups were identified and characterized
using FTIR. Overall, these results will be useful in selecting parental cultivars for
rice breeding programs