Genome-Wide Associations of Chlorophyll Fluorescence OJIP Transient Parameters Connected With Soil Drought Response in Barley

To assess the reliability and sensitivity of non-invasive optical methods to detect the early effects of water deficit in the field, we analyzed the time-series of non-invasive measurements obtained in a dry season in a representative collection of wheat genotypes grown in small-plot field trials, in non-irrigated and irrigated variants. Despite a progressive water deficit and significant yield loss, the measurements indicated very minor changes in chlorophyll content or canopy cover. This corresponded well to the insignificant differences in spectral reflectance normalized difference vegetation index (NDVI) values. On the other hand, we identified the significant and rapid response of fast fluorescence kinetics data following the onset of irrigation. Analysis of parameters showed the main effects of drought were associated with changes in the amplitude of the I–P phase of the OJIP transient, indicating changes at the level of photosystem I and beyond. Statistical analyses identified the integrative parameter performance index PItot as the most sensitive parameter, which well-reflects the differences in responses of the genotypes to water deficit. Our results suggest that focusing on photosynthetic functions detected by the rapid chlorophyll fluorescence records can provide more accurate information on the drought stress level, compared to the structural data obtained by absorbance or reflectance measurements.

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Genome-wide association analysis detecting significant single nucleotide polymorphisms for chlorophyll and chlorophyll fluorescence parameters in soybean (Glycine max) landraces

Euphytica ◽

10.1007/s10681-012-0697-x ◽

2012 ◽

Vol 186 (3) ◽

pp. 919-931 ◽

Cited By ~ 47

Author(s):

Derong Hao ◽

Maoni Chao ◽

Zhitong Yin ◽

Deyue Yu

Keyword(s):

Chlorophyll Fluorescence ◽

Glycine Max ◽

Single Nucleotide Polymorphisms ◽

Association Analysis ◽

Genome Wide Association ◽

Nucleotide Polymorphisms ◽

Single Nucleotide ◽

Chlorophyll Fluorescence Parameters ◽

Fluorescence Parameters ◽

Genome Wide

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Genetic structure of Photosystem II functionality in rice unraveled by GWAS analysis

10.1101/2020.09.28.317479 ◽

2020 ◽

Author(s):

Juan Manuel Vilas ◽

Estanislao Burgos ◽

Maria Lucrecia Puig ◽

Jose Colazo ◽

Alberto Livore ◽

...

Keyword(s):

Chlorophyll Fluorescence ◽

Genetic Structure ◽

Photosystem Ii ◽

Association Studies ◽

Rice Genome ◽

Genome Wide Association ◽

World Population ◽

Genome Wide Association Studies ◽

Chlorophyll Fluorescence Parameters ◽

Genome Wide

AbstractRice production is a particularly important crop for the half-world population. Therefore, knowledge about which genes are implicated in the functionality of the Photosystem II, that are still poorly explored could collaborate in the assisted selection of rice improving. In the present study, we applied Genome wide Association Studies of PSII chlorophyll fluorescence under two contrasting environmental conditions in 283 rice accessions highly diverse. A total of 110 significant association SNP-phenotype were observed, and 69 quantitative trait loci identified with a total of 157 genes, of which 38 were highly significant, mapped spread out through rice genome. These underlying regions are enriched in genes related to biotic and abiotic stresses, transcription factors, Calvin cycle, senescence, and grain characters. The correlations analyses PSII chlorophyll fluorescence parameters and some panicle characteristics found here suggest the possibility of developing molecular markers to assist the breeding programs that improve photosynthesis and yield in rice.HighlightThe genetic structure of the Photosystem II functionality in rice was studied by using genome-wide association through chlorophyll fluorescence.

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Genome-wide transcriptome and physiological analyses provide new insights into peanut drought response mechanisms

Scientific Reports ◽

10.1038/s41598-020-60187-z ◽

2020 ◽

Vol 10 (1) ◽

Cited By ~ 1

Author(s):

Sailaja Bhogireddy ◽

Abishek Xavier ◽

Vanika Garg ◽

Nancy Layland ◽

Renee Arias ◽

...

Keyword(s):

Drought Response ◽

Genome Wide

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The cell wall-bound phenolics as a biochemical indicator of soil drought resistance in winter triticale

Plant Soil and Environment ◽

10.17221/665/2012-pse ◽

2013 ◽

Vol 59 (No. 5) ◽

pp. 189-195 ◽

Cited By ~ 19

Author(s):

T. Hura ◽

K. Hura ◽

A. Ostrowska ◽

M. Grzesiak ◽

K. Dziurka

Keyword(s):

Cell Wall ◽

Chlorophyll Fluorescence ◽

Water Status ◽

Soil Drought ◽

Leaf Water Status ◽

Winter Triticale ◽

Biochemical Indicator ◽

Drought Conditions ◽

Free Phenolics ◽

Bound Phenolics

The leaf dehydration was accompanied by the highest increase in the content of cell wall-bound phenolics (CPh) during heading (148.3% C; % of control) and in course of drought applied twice during propagation and flowering (130.5% C) of triticale. A statistically significant correlations were obtained only for CPh and parameters of leaf water status and chlorophyll fluorescence. An increase in the content of free phenolics (FPh) under drought conditions was only noticed during the flowering (111.4% C) of plants. Drought application exhibited most spectacular decrease in the ratio of FPh to CPh during propagation (48.5% C) and heading (58.8% C). It was found that the cell wall increases at the expense of free phenolic compounds.

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