Year: 2022

TIMING CYCLES WITH SEASONS. "The duration of these different states widely varies between species and the timing of the transitions between them is highly regulated. This regulation ensures that the most vulnerable phases of the life cycle occur during favourable seasonal and environmental conditions. Two of the systems that control developmental transitions depend on dormancy mechanisms." https://lnkd.in/dgHUjzK View in LinkedIn

"BUD DORMANCY prevents the outgrowth of buds, for instance in perennial plants during winter or in potato tubers, whereas seed dormancy prevents the germination of intact viable seeds during (temporary) favourable conditions in an otherwise unfavourable season. Both types of dormancy are characterized by very low metabolic activities and a temporary insensitivity to growth-promoting signals." https://lnkd.in/dgHUjzK View in LinkedIn

TYPES OF DORMANCY. "Different seed dormancy classes exist among plant species, which can be divided in physiological dormancy, morphological dormancy, morphophysiological dormancy, physical dormancy and combinational dormancy. Physiological dormancy is most common and can be separated into deep and non-deep, of which the latter is the most prevalent and also the major form of dormancy in plant model species." https://lnkd.in/dgHUjzK View in LinkedIn

COMPLEX TRAIT. "Dormancy is a complex trait because it is influenced by both environmental and endogenous factors. Moreover, the final level of dormancy is determined by the contributions of the different tissues that comprise a seed." https://lnkd.in/dgHUjzK View in LinkedIn

ENDOSPERM BARRIER. "In several species, including the model plant Arabidopsis thaliana, the endosperm has a pivotal role as a regulatory barrier. Germination and dormancy depend on the balance between the growth force of the elongating radicle and the resistance strength of the surrounding tissues." https://lnkd.in/dgHUjzK View in LinkedIn

OPENING THE BLACK BOX. "A number of essential and specific dormancy genes have been identified, as well as chromatin organizers that influence seed dormancy induction. The release of dormancy has long been a black box, but the recent recognition of the important contribution of non-enzymatic processes, like oxidation, in the after-ripening process is starting to reveal the mechanisms behind this process." https://lnkd.in/dgHUjzK View in LinkedIn

MOLECULAR INTERACTIONS. "Despite the progress of the last years, several major questions remain unanswered. It is for instance largely unknown how temperatures are sensed during stratification. Even more importantly, the true molecular identity of dormancy is not understood yet. Many factors influencing dormancy have been described, but it is not known for most of them how they interact and relate with each other." https://lnkd.in/dgHUjzK View in LinkedIn

MASTER REGULATOR. "It is also not known whether the molecular nature of dormancy consists of a combination of many different factors or whether a central agent exists that functions downstream of all these factors." https://lnkd.in/dgHUjzK View in LinkedIn

ENVIRONMENTAL SIGNAL. "An extended chilling period is a signal for dormancy release of shoot apical and cambial meristems of many woody plants, herbaceous plant tubers and seeds of various plants as well as for the promotion of the floral transition in both monocarpic and polycarpic plant species." https://lnkd.in/duazcMZ View in LinkedIn

DORMANCY RELEASE. "We focus on the release of bud dormancy and the floral transition, post-embryonic responses of shoot meristems that occur in trees. A dormant meristem is unable to resume growth under favorable conditions; however, the dormant state is quantitative with endogenous and environmental signals continually altering the depth of dormancy (propensity for growth given advantageous conditions." https://lnkd.in/duazcMZ View in LinkedIn