SciELO - Scientific Electronic Library Online

 
vol.21 número3Análisis de la estructura y distribuciones diamétricas en bosques templados bajo la perspectiva del régimen potencial de fuegoVariación individual en atributos de Clusia salvinii Donn. Smith asociados a la atracción de frugívoros en la dispersión de frutos y semillas índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista Chapingo serie ciencias forestales y del ambiente

versão On-line ISSN 2007-4018versão impressa ISSN 2007-3828

Resumo

CASTELAN-MUNOZ, Natalia et al. Familial variation in Pinus leiophylla Schiede ex Schltdl. & Cham. seedlings in response to drought: water and osmotic potential. Rev. Chapingo ser. cienc. for. ambient [online]. 2015, vol.21, n.3, pp.295-306. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2014.10.043.

The seedling variation in four families of Pinus leiophylla with different origins was evaluated regarding the reaction to drought, considering water potential variables (ψa), osmotic potential variables (ψ0), components and biomass allocation. The families of P. leiophylla are located in a seed orchard of the Colegio de Postgraduados in the State of Mexico. The study was done with the purpose of identifying the genotypes resistant to water stress. After 26 days without water, 50 % of the seedlings presented permanent decay in the apex of the stem, with ψa = -3.35 MPa and ψ0 = -3.23 MPa, which represented a decrease of 596 and 112 %, respectively, due to drought. The accumulation of biomass was also significantly affected (P = 0.05) in the families assessed, with the exception of the family from San Rafael. On average, the biomass of the root of the seedlings in drought was 38 % smaller than that of the seedlings under normal circumstances. The P. leiophylla families from San Juan Tetla and Santa María Atepetzingo (both from the state of Puebla) presented a weaker response to the stress imposed, whereas the family from Tlalmanalco (State of Mexico) was the most affected.

Palavras-chave : Water stress; water potential; osmotic potential; biomass allocation.

        · resumo em Espanhol     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons