Changes in free amino acid content and frost resistance in Nothofagus dombeyi leaves

Meza-Basso, Luís; Guarda, P.; Ríos, Darcy; Alberdi, Miren

doi:10.1016/s0031-9422(00)81159-0

Cited by 34 publications

(21 citation statements)

References 14 publications

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“…Considering the formerly mentioned ontogenetic delay, it makes sense that primary needles are (at least) as tolerant to frost stress as secondary needles. A similar explanation has been postulated in the comparison of juvenile and adults in colonizing Nothofagus broadleaved species (Meza-Basso et al, 1986). The third species with similarly low tolerance of primary and secondary needles was P. radiata.…”

Section: P C a N A R Ie N S Is P R A D Ia T A P P In E A P H supporting

confidence: 70%

“…Given that the first years are critical for the establishment of long-lived woody plants, differential responses to extreme temperatures in early developmental stages are likely to be subjected to strong directional selection within each species' ecological niche (Meza-Basso et al, 1986). However, the different susceptibility to frosts of seedlings and adults does not follow a common pattern in woody plants.…”

Section: Introductionmentioning

confidence: 99%

“…But in fact, the temperature gradient of air from the soil to upper levels differ sharply depending on the predominant cause of frost, either radiation or advection, well documented in bioclimatic research (Taylor, 1970). In different woody plants there are examples of higher frost tolerance in juveniles (Bannister et al, 1995;Meza-Basso et al, 1986), in adults (Boorse et al, 1998) or no difference, as reported for Pinus radiata (Greer et al, 1989). Furthermore, the presence of sharp heteroblastic differences in the shoot development of young plants in some species adds further complexity -but also interest-to the comparison of the ontogenetic adaptive differences between juveniles and adults (Darrow et al, 2001;Jones, 1999;Winn, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Freezing injury in primary and secondary needles of Mediterranean pine species of contrasting ecological niches

Climent

Silva²,

Chambel

et al. 2009

Ann. For. Sci.

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Abstract• Pine seedlings show a marked ontogenetic difference between primary and secondary needles, the latter prevailing with a different timing among species.• Using the electrolyte leakage method following an artificial freezing test, we aimed at (1) determining the differences in freezing tolerance between primary and secondary needles in eight pines of contrasting thermal habitats: P. canariensis, P. pinea, P. halepensis, P. brutia, P. pinaster, P. nigra, P. sylvestris and P. radiata, (2) evaluating the relation between freezing tolerance and sclerophylly and (3) relating freezing tolerance with the climate of origin.• Primary needles were significantly more sensitive to freezing than secondary needles in Pinus halepensis, P. brutia, P. pinaster and P. nigra, whereas no differences were found in P. canariensis, P. pinea and P. radiata. LT50 was uncorrelated with needle sclerophylly but very highly correlated with the mean temperature of the coldest month at the seed source.• Results support an adaptive role of secondary needles in the mountain Mediterranean pines P. nigra, P. pinaster and P. brutia, while the more complex responses in coastal Mediterranean pines can be interpreted in the light of seedling ontogeny and species' ecological niches. Mots-clés :gel / perte d'électrolyte / gelée / ontogénie / hétéroblastie Résumé -Dégâts du gel sur des aiguilles primaires et secondaires chez différentes espèces de pins méditerranéens dans des niches écologiques contrastées.• Les jeunes plants de pin présentent une nette différence ontogénétique entre aiguilles primaires et secondaires, les secondes devenant dominantes après des délais variables selon les espèces.• À l'aide d'une expérience de gel artificiel et à l'aide de la méthode de perte d'électrolyte, nous avons visé à : (1) déterminer les différences de tolérance au gel entre aiguilles primaires et secondaires de huit espèces de pins présentant des habitats thermiques contrastés : P. canariensis, P. pinea, P. halepensis, P. brutia, P. pinaster, P. nigra, P. sylvestris et P. radiata, (2) évaluer la relation entre tolérance au gel et degré de sclérophyllie, et (3) mettre en relation tolérance au gel et climat d'origine.• Les aiguilles primaires étaient beaucoup plus sensibles au gel que les aiguilles secondaires chez Pinus halepensis, P. brutia, P. pinaster et P. nigra, alors qu'aucune différence n'a été constatée chez P. canariensis, P. pinea et P. radiata. La température induisant 50 % de mortalité n'était pas corrélée avec la sclérophyllie des aiguilles mais très fortement avec la température moyenne du mois le plus froid de la provenance des semences.• Les résultats corroborent l'idée d'un rôle adaptatif des aiguilles secondaires des pins méditerra-néens montagnards P. nigra, P. pinaster et P. brutia, tandis que les réponses plus complexes des pins méditerranéens côtiers peuvent être interprétées à la lumière de l'ontogénie des semis et des niches écologiques des espèces.

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Section: P C a N A R Ie N S Is P R A D Ia T A P P In E A P H supporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Freezing injury in primary and secondary needles of Mediterranean pine species of contrasting ecological niches

Climent

Silva²,

Chambel

et al. 2009

Ann. For. Sci.

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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%

“…Most of those reports refer to the accumulation of free proline (Pro) 14,22 . Meza-Basso et al (1986) 23 presented evidence of a probable cryo-protector role of free Pro in Nothophagus dombeyi leaves due to its increase in fall and winter and its decrease in summer and spring. 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 .…”

Section: Introductionmentioning

confidence: 99%

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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Physiological Aspects of Cold Hardiness in Northern Deciduous Tree Species

Junttila

Welling

et al. 2002

Plant Cold Hardiness

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Changes in free amino acid content and frost resistance in Nothofagus dombeyi leaves

Cited by 34 publications

References 14 publications

Freezing injury in primary and secondary needles of Mediterranean pine species of contrasting ecological niches

Freezing injury in primary and secondary needles of Mediterranean pine species of contrasting ecological niches

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

Physiological Aspects of Cold Hardiness in Northern Deciduous Tree Species

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