Plasma Membrane Alterations in Callus Tissues of Tuber-bearing Solanum Species during Cold Acclimation 1
AUTOR(ES)
Toivio-Kinnucan, Maria A.
RESUMO
Plasma membrane alterations in two tuber-bearing potato species during a 20-day cold acclimation period were investigated. Leaf-callus tissues of the frost-resistant Solanum acaule Hawkes `Oka 3878' and the frost-susceptible, commonly grown Solanum tuberosum `Red Pontiac,' were used. The former is a species that can be hardened after subjecting to the low temperature, and the latter does not harden. Samples for the electron microscopy were prepared from callus cultures after hardening at 2 C in the dark for 0, 5, 10, 15, and 20 days. After 20 days acclimation, S. acaule increased in frost hardiness from −6 to − 9 C (killing temperature), whereas frost hardiness of S. tuberosum remained unchanged (killed at −3 C). Actually, after 15 days acclimation, a −9 C frost hardiness level in S. acaule callus cultures had been achieved.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=425709Documentos Relacionados
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