Differential effect of short-term cold stress on growth, anatomy, and hormone levels in cold-sensitive versus -resistant cultivars of Dagitaria eriantha

• Autorzy: Garbero M. , Andrade A. , Reinoso H. , Fernandez B. , Cuesta C. , Granada V. , Escudero C. , Abdala G. , Pedranzani H.
• Języki publikacji: EN

Abstrakty

EN

Two cultivars of Digitaria eriantha (cold-sensitive cv. Sudafricana and cold-resistant cv. Mejorada INTA) were exposed to cold stress (5 °C) for 0, 6, 24, or 72 h, and compared in terms of leaf and root growth, recovery period, shoot and leaf anatomy, and levels of chlorophyll, auxin (indole-3-acetic acid, IAA) and cytokinins (CKs). In Sudafricana, cold treatment caused reduced growth, slight changes in chlorophyll level, reduced levels of IAA and CK iso-pentenyladenine (iP), and reduced leaf dry weight (DW) and fresh weight (FW) during the recovery period. Anatomical damage was observed in chloroplasts, main stem, and axillary buds. Ultrastructural study showed reduced numbers of starch grains in chloroplasts of the bundle sheath and mesophyll. In Mejorada, cold treatment had no significant effect on growth or chlorophyll level. Leaf DW and FW quickly returned to normal levels during the recovery period. Anatomy of ground meristem was affected, but ultrastructure of bundle sheath and mesophyll chloroplasts was not. The cold tolerance of cv. Mejorada appears to be related to the stability of chlorophyll and CK levels, increase of IAA, and maintenance of normal shoot and leaf anatomy and ultrastructure.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 6
• Opis fizyczny: p.2079-2091,fig.,ref.

Twórcy

autor

Garbero M.

• Laboratorio de Fisiologia Vegetal, Departamento de Ciencias Agropecuarias, Facultad de Ingenieria y Ciencias Economico-Sociales (FICES), Universidad Nacional de San Luis, Av.25 de Mayo 384, 5730 Villa Mercedes, San Luis, Argentina

autor

Andrade A.

• Laboratorio de Fisiologia Vegetal, Departamento de Ciencias Naturales, Universidad National de Rio Cuarto, 5800 Rio Curato, Cordoba, Argentina

autor

Reinoso H.

• Laboratorio de Fisiologia Vegetal, Departamento de Ciencias Naturales, Universidad National de Rio Cuarto, 5800 Rio Curato, Cordoba, Argentina

autor

Fernandez B.

• Departamento de Biologia de Organismos y Sistemas, Universidad de Oviedo, Oviedo, Spain

autor

Cuesta C.

• Departamento de Biologia de Organismos y Sistemas, Universidad de Oviedo, Oviedo, Spain

autor

Granada V.

• Departamento de Biologia de Organismos y Sistemas, Universidad de Oviedo, Oviedo, Spain

autor

Escudero C.

• Laboratorio de Fisiologia Vegetal, Departamento de Ciencias Agropecuarias, Facultad de Ingenieria y Ciencias Economico-Sociales (FICES), Universidad Nacional de San Luis, Av.25 de Mayo 384, 5730 Villa Mercedes, San Luis, Argentina

autor

Abdala G.

• Laboratorio de Fisiologia Vegetal, Departamento de Ciencias Naturales, Universidad National de Rio Cuarto, 5800 Rio Curato, Cordoba, Argentina

autor

Pedranzani H.

• Laboratorio de Fisiologia Vegetal, Departamento de Ciencias Agropecuarias, Facultad de Ingenieria y Ciencias Economico-Sociales (FICES), Universidad Nacional de San Luis, Av.25 de Mayo 384, 5730 Villa Mercedes, San Luis, Argentina

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