Amino acid and glycine betaine accumulation in cold-stressed wheat seedlings

Naidu, Bodapati P.; Paleg, L. G.; Aspinall, D.; Jennings, Allen C.; Jones, Graham P.

doi:10.1016/0031-9422(91)83693-f

Cited by 138 publications

(85 citation statements)

References 19 publications

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“…These results are in agreement with some previously reported works, where Asp, Glu, Gln, Arg and Ala levels incremented under low non-freezing temperatures 30,31 , and a diminution of some of them such as Glu, when freezing temperatures were applied over the plants was observed 23 ; however, not all these amino acids could be responsible for the increased cold resistance of the genotypes. Table 2.…”

Section: Statistical Analysis (Anova)supporting

confidence: 93%

“…Several others works [24][25][26] found relationships between accumulation of Pro and freezing tolerance, although other results suggest that Pro increments are due to the exposure to cold temperatures rather than an enhanced freezing tolerance 22,27,28 . Few studies have analyzed other amino acids [29][30][31] . Variations in the content of Glu, Gln, Ala, Asp and Asn after cold conditions have been reported in wheat 30,31 .…”

Section: Introductionmentioning

confidence: 99%

“…Few studies have analyzed other amino acids [29][30][31] . Variations in the content of Glu, Gln, Ala, Asp and Asn after cold conditions have been reported in wheat 30,31 . 29 found higher levels of Pro, Gln and Glu and greater differences of amino acid content for three ecotypes of Poa annua L. after an acclimatization at subzero temperatures (-2ºC); however the amino acid levels were not related to the differential freezing tolerance of the ecotypes.…”

Section: Introductionmentioning

confidence: 99%

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Classification of Genotypes of Eucalyptus Globulus Under Cold Conditions Using Their Free Amino Acids Content on Leaves and Regularized Discriminant Analysis (Rda)

Castillo¹,

Contreras²,

Baeza³

et al. 2010

J. Chil. Chem. Soc.

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Eucalyptus globulus is an important forestry species for wood and pulp industry; however, its low cold resistance is a serious disadvantage. In this work, chemometric techniques were applied on the leaves' free amino acid content of different E. globulus genotypes in order to select cold tolerant genotypes. Pattern recognition methods based on regularized discriminant analysis (RDA) were used to classify the genotypes by cold resistance using samples' foliar damages as reference of cold resistance. Correlation between the amino acids content and cold resistance of genotypes was determined from a partial least squares (PLS) model. RDA models showed an excellent classification of genotypes (100% of correctly assigned genotypes in external validation), especially when RDA was reduced to quadratic discriminant analysis (QDA). Arg, Tyr and Ala, showed the highest correlations with the foliar damage in the PLS model and they could be responsible to improve cold resistance to the studied genotypes.

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Section: Statistical Analysis (Anova)supporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Classification of Genotypes of Eucalyptus Globulus Under Cold Conditions Using Their Free Amino Acids Content on Leaves and Regularized Discriminant Analysis (Rda)

Castillo¹,

Contreras²,

Baeza³

et al. 2010

J. Chil. Chem. Soc.

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“…ABA and drought treatments can trigger an increase in BADH mRNA levels and the content of BADH protein in barley leaves at low temperature, but the results showed a low level accumulation of GB [12], [26]. Naidu et al [27] reported that concentration of accumulated betaine in cold-stressed wheat seedlings increased more than doubled in the controls. In this study, cold stress (4 o C) and ABA treatment did not affect CMO and BADH expression in A. tricolor.…”

Section: Discussionmentioning

confidence: 98%

Isolation of a choline monooxygenase cDNA clone from Amaranthus tricolor and its expressions under stress conditions

Meng

Zhang

et al. 2001

Cell Res

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Plants synthesize the osmoprotectant glycine betaine (GB) via choline betaine aldehyde glycine betaine [1]. Two enzymes are involved in the pathway, choline monooxygenase (CMO) and betaine aldehyde dehydrogenase (BADH). A full length CMO cDNA (1,643bp) was cloned from Amaranthus tricolor. The open reading frame encoded a 442-amino acid polypeptide, which showed 69% identity with CMOs in Spinacia oleracea L. and Beta vulgaris L. DNA gel blot analysis indicated the presence of one copy of CMO gene in the A. tricolor genome. The expressions of CMO and BADH proteins in A.tricolor leaves significantly increased under salinization, drought and heat stress (42 o C), as determined by immunoblot analysis, but did not respond to cold stress (4 o C), or exogenous ABA application. The increase of GB content in leaves was parallel to CMO and BADH contents.

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“…[3][4][5] These include proline, sucrose, polyols, trehalose and quaternary ammonium compounds (QACs) such as glycine betaine, alinine betaine, proline betaine and pipecolate betaine. 6,7 The phenomenon of proline accumulation is known to occur under water deficit, 8 salinity, 9,10 low temperature, 11 heavy metal exposure [12][13][14][15] UV radiations, etc. Apart from acting as an osmolyte for osmotic adjustment, proline contributes to stabilizing sub-cellular structures (e.g., membranes and proteins), scavenging free radicals and buffering cellular redox potential under stress conditions.…”

Section: A Reviewmentioning

confidence: 99%