Winter disruption of the circadian clock in chestnut | Zendy

Alberto Ramos | Zendy; Estefanía Pérez-Solís | Zendy; Cristian Ibáñez | Zendy; Rosa Casado | Zendy; Carmen Collada | Zendy; Luis Gómez | Zendy; Cipriano Aragoncillo | Zendy; Isabel Allona | Zendy

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Winter disruption of the circadian clock in chestnut

Author(s) -

Alberto Ramos,

Estefanía Pérez-Solís,

Cristian Ibáñez,

Rosa Casado,

Carmen Collada,

Luis Gómez,

Cipriano Aragoncillo,

Isabel Allona

Publication year - 2005

Publication title -

proceedings of the national academy of sciences

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.011

H-Index - 771

eISSN - 1091-6490

pISSN - 0027-8424

DOI - 10.1073/pnas.0408549102

Subject(s) - arabidopsis , circadian rhythm , circadian clock , biology , dormancy , botany , photoperiodism , microbiology and biotechnology , gene , genetics , endocrinology , germination , mutant

Circadian clock performance during winter dormancy has been investigated in chestnut by using as marker genes CsTOC1 and CsLHY, which are homologous to essential components of the central circadian oscillator in Arabidopsis. During vegetative growth, mRNA levels of these two genes in chestnut seedlings and adult plants cycled daily, as expected. However, during winter dormancy, CsTOC1 and CsLHY mRNA levels were high and did not oscillate, indicating that the circadian clock was altered. A similar disruption was induced by chilling chestnut seedlings (to 4 degrees C). Normal cycling resumed when endodormant or cold-treated plants were returned to 22 degrees C. The behavior of CsTOC1 and CsLHY during a cold response reveals a relevant aspect of clock regulation not yet encountered in Arabidopsis.

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