Effect of water stress conditioning on the water relations, root growth capacity, and the nitrogen and non-structural carbohydrate concentration of Pinus halepensis Mill. (Aleppo pine) seedlings

Villar-Salvador, Pedro; Ocaña, L.; Peñuelas, J.; Carrasco, I

doi:10.1051/forest:19990602

Cited by 81 publications

(53 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An osmotic adjustment potential as a response to water stress, that varies from provenance to provenance, is of the same type as that observed in 2-year-old Aleppo pine seedlings from Italian provenances [35]. Conversely, a study performed on only one provenance of Aleppo pine at the beginning of autumn has shown that drought did not induce any osmotic adjustment in 1-year old plants [38].…”

mentioning

confidence: 91%

“…This difference may be due to the fact that we did not re-hydrate our samples or to the fact that the seedlings we examined were younger. Conversely, Villar-Salvador et al [38] did not observe any WD 0 variations in Aleppo pines subjected to water stress.…”

mentioning

confidence: 99%

“…Even in stress tests lasting much longer [35,38], no significant variations of ε were recorded in drought-stressed Aleppo pines and provenances.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Resistance to water stress in seedlings of eight European provenances of Pinus halepensis Mill.

et al. 2001

View full text Add to dashboard Cite

-In this study, pressure/volume curves were performed on 24-week-old seedlings of eight European provenances of Pinus halepensis Mill. subsp. halepensis after one week of water stress (-0.033, -0.4, -0.8, -1.2, -1.6 MPa). P. halepensis showed osmotic adjustments as a response to water stress, although the response varied between the provenances. Apoplastic water remained relatively constant. The elasticity module did not differ significantly. Water deficit at incipient plasmolysis and water content decreased as the stress increased. Water potential was markedly negative, even in seedlings not subjected to stress. The provenances from less xeric sites behaved similarly to species from non-arid sites, while those from more xeric sites displayed the strategy typical of drought-tolerant species. The impact on all provenances of one week of low-intensity water stress (-0.4 MPa) was slight. As the stress increased, the response varied between the provenances: N-Eubea > Kassandra > Litorale tarantino ≅ Guardiola > Otricoli ≅ E-Bouches du Rhône ≥ Hérault ≅ N-Vaucluse (in decreasing order).Aleppo pine / drought resistance / geographic variation / pressure-volume curves / provenances Résumé -Résistance au stress hydrique des plantules appartenant à huit provenances européennes de Pinus halepensis Mill. Sur des plantules âgées de 24 semaines, appartenant à 8 provenances de Pinus halepensis (Mill.) subsp. halepensis, des courbes pression-volume ont été effectuées après une semaine de stress hydrique (-0,033, -0,4, -0,8, -1,2, -1,6 MPa). P. halepensis a montré des ajustements osmotiques en réponse au stress hydrique, bien que de façon différenciée parmi les provenances. L'eau apoplastique a été relativement constante. Le module d'élasticité n'a pas différé significativement. Le déficit hydrique en début de plasmolyse et la teneur en eau ont baissé avec l'augmentation du stress. Le potentiel hydrique a été très négatif, même en absence de stress. Les semences provenant des milieux les moins secs se sont comporté de façon identique aux espèces des milieux non arides, tandis que les provenances originaires des milieux les plus secs ont révélé la stratégie caractéristique des espèces tolérant la sécheresse. En conclusion les provenances ont été insuffisamment influencées par une semaine de stress hydrique de faible intensité. En présence d'un accroissement du stress, les réponses ont permis de différencier les provenances : N-Eubea > Kassandra > Litorale tarantino ≅ Guardiola > Otricoli ≅ E-Bouches du Rhône ≥ Hérault ≅ N-Vaucluse (en ordre décroissant).courbes pression-volume / Pin d'Alep / provenances / résistance à la sécheresse / variation géographique Ann. For. Sci. 58 (2001) [663][664][665][666][667][668][669][670][671][672] 663

show abstract

mentioning

confidence: 91%

mentioning

confidence: 99%

See 1 more Smart Citation

Resistance to water stress in seedlings of eight European provenances of Pinus halepensis Mill.

et al. 2001

View full text Add to dashboard Cite

show abstract

“…Second, species may have different responses to N fertilization. For instance, Ypsat and Y p tlp in P. halepensis and P. pinea have small seasonal variations or little changes in response to drought (Villar-Salvador et al, 1999;Villar-Salvador et al, 2000). Kleiner et al (1992) found no differences in Ypsat and Yptlp in two oak species in well-watered plants grown under contrasted fertilization.…”

Section: Nitrogen Fertilization and Stress Resistance 415mentioning

confidence: 99%

Effect of nitrogen fertilization in the nursery on the drought and frost resistance of Mediterranean forest species

et al. 2005

View full text Add to dashboard Cite

The objective of this study was to assess the effect of N fertilization in the nursery on frost and water stress resistance of seedlings in Mediterranean forest species. We reviewed the data of six independent fertilization experiments that were performed between 1997 and 2003 in six Mediterranean forest species: three oaks (Quercus suber L., Q. ilex L., and Q. coccifera L.), and three conifer (Pinus pinea L., P. halepensis Mill., and Juniperus thurifera L.). Plants were cultivated under two contrasting N fertilization regimes and at the end or during the cultivation period several parameters related to drought and frost resistance were measured. N fertilization affected more the morphological than the physiological characters. Changes in most morphological traits in response to N fertilization tended to have the same variation pattern, whereas physiological traits had variable responses. N Fertilization reduced frost hardiness in Pinus species and increased the osmotic potential both at full turgor and at turgor loss point in J. thurifera. High-fertilized (HN) seedlings in all species were larger and had greater shoot to root mass ratio than low-fertilized or unfertilized (LN) plants. HN pine seedlings also had higher stomatal conductance than LN plants. These characteristics might impair the water balance of HN plants if soil water content remains low immediately after transplanting. In contrast, HN plants showed higher new root growth capacity than LN seedlings and the proportion of new roots emerging from the plug with respect to shoot size did not differ between fertilization treatments or it was greater in HN plants than in LN seedlings. These responses could improve the efficiency of roots to explore the soil and, therefore, the drought avoiding capacity of HN plants.Key words: Drought tolerance, electrolyte leakage, fluorescence, osmotic potential, root growth, transpiration. ResumenEfecto de la fertilización nitrogenada en el vivero sobre la resistencia a la sequía y a la helada en especies forestales mediterráneasEl objetivo de este estudio es abordar el efecto de la fertilización nitrogenada en vivero sobre la resistencia a la helada y a la sequía en diferentes especies forestales mediterráneas. Para ello se revisaron los datos de seis experimentos independientes realizados entre 1997 y 2003 con con seis especies forestales mediterraneas (tres especies de Quercus: Q. suber L., Q. ilex L., Q. coccifera L.; y tres coníferas: Pinus pinea L., Pinus halepensis Mill., Juniperus thurifera L.). Las plantas fueron cultivadas bajo dos niveles contrastados de fertilización nitrogenada. Durante o al final del cultivo se midieron diferentes parámetros relacionados con la resistencia a la helada y la sequía. La fertilización con N afectó más a los caracteres morfológicos que a los fisiológicos. Los cambios en la mayoría de parámetros morfológicos en respuesta a la fertilización nitrogenada tendieron a seguir el mismo patrón de variación, mientras que las respuestas fisiológicas fueron más variables. El N di...

show abstract

“…Most North American nurseries reduce irrigation or fertilisation in late summer and fall as a part of this conditioning process [34,66]. Nevertheless, these latter treatments have not always been effective in inducing plant dormancy in Pinus halepensis seedlings [56,63]. This species shows osmotic adjustment as a response to water stress, although the response varies between the provenances [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of temperature on growth and stress hardening development of phytotron-grown seedlings of Aleppo pine (Pinus halepensis Mill.)

Fernández

Royo²,

Gil³

et al. 2003

Ann. For. Sci.

View full text Add to dashboard Cite

-One year-old Pinus halepensis seedlings, grown in peat-vermiculite-pine bark mix in 200 cm 3 containers, were moved to a growth chamber and submitted to a progressive decrease of temperature and photoperiod for three months. Morphological parameters and nutrient and non-structural carbohydrate content were measured. Root growth potential, freezing and drought resistance tests were assessed. Although height growth stopped when the minimum temperature fell below 9 ºC, shoot dry weight increased further. Needle potassium concentration and K/N ratio increased progressively and significantly throughout the trial. This may be attributed to potassium accumulation. As height growth stopped, physiological changes were detected in shoot nitrogen and soluble sugar concentrations, root activity and hydraulic conductance maintenance. Nevertheless, cold and drought resistance tests, as well as root regeneration potential, did not reveal any sign of plant stress tolerance until the minimum temperature decreased to 8 ºC and photoperiod to 9 h. This latter temperature may be considered to be the threshold for Pinus halepensis to accumulate the required chilling hours that make seedlings suitable for afforestation purposes. At least, more than 330 chilling hours (£ 8 ºC) are required to reach a minimum level of stress hardiness. The Fv/Fm chlorophyll fluorescence ratio, measured just one day after the freezing test, provides a good estimate of plant frost tolerance.Pinus halepensis / plant quality / stress tolerance / chilling hours / chlorophyll fluorescence / plant nutrition Résumé -Effets de la température sur la croissance et le développement de la résistance au stress de semis de Pin d'Alep (Pinus halepensis Mill.). Des semis de Pin d'Alep (Pinus halepensis), âgés d'un an, croissant sur un mélange de tourbe-vermiculite-écorce de pin dans des containers de 200 cm 3 , ont été mis en place dans une chambre de croissance et soumis, pour une période de 3 mois, à une température et photopériode décroissant progressivement. Des paramètres morphologiques, de nutrition et de teneur carbonée non structurale ont été mesurés. Des tests de potentiel de croissance racinaire, de résistance au froid et à la sécheresse ont été réalisés. Bien que la croissance en hauteur se soit arrêtée lorsque la température minimum eu atteint 9°C, la masse sèche des pousses continue d'augmenter. La concentration en potassium des aiguilles, le rapport K/N augmente progressivement et significativement au cours de l'essai. Ceci peut être attribué à une accumulation de potassium. Lorsque la croissance en hauteur s'est arrêtée, des changements physiologiques ont été constatés pour la concentration en azote et en sucre soluble des pousses, dans l'activité des racines et dans le maintien de la conductance hydraulique. Cependant, les tests de résistance au froid et à la sécheresse, de même que le potentiel de régénération racinaire, ne révélèrent aucun signe de tolérance de la plante au stress jusqu'à ce que la température minimum décroisse à 8°C et la ph...

show abstract

Effect of water stress conditioning on the water relations, root growth capacity, and the nitrogen and non-structural carbohydrate concentration of Pinus halepensis Mill. (Aleppo pine) seedlings

Abstract: -One-year-old Pinus halepensis seedlings were subjected to four water stress conditioning treatments (control,

Cited by 81 publications

References 23 publications

Resistance to water stress in seedlings of eight European provenances of Pinus halepensis Mill.

Resistance to water stress in seedlings of eight European provenances of Pinus halepensis Mill.

Effect of nitrogen fertilization in the nursery on the drought and frost resistance of Mediterranean forest species

Effects of temperature on growth and stress hardening development of phytotron-grown seedlings of Aleppo pine (Pinus halepensis Mill.)

Contact Info

Product

Resources

About