Photoperiod, diapause and cold-hardiness

摘要: Great progress has recently been made in cryobiology. One field, however, neglected: the temporal sequence of effects photoperiod and temperature, their relative importance cold hardening. This is relevant to question impor- tance diapause cold-hardiness. Denlinger (1991) outlined categories such relations stressed a great need for further detailed research. A survey studies done over past decade revealed many gaps evidence ambiguous nature data on photoperiodic regulation We hope that this review will stimulate research field. Among several directions where most needed we have (1) simultaneous recording changes survival dynamics suspected cryoprotectants (stressed also by Danks, 1996), (2) checking different phases hardening, (3) discrimination between direct indirect (mediated via neuroendocrine system) environmental cues harden- ing.