Hormones and Dormancy

Wareing, P. F.; Saunders, P. F.

doi:10.1146/annurev.pp.22.060171.001401

Cited by 247 publications

(109 citation statements)

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“…The advantages of using physical methods for detection and quantification of plant growth hormones have been stressed by Wareing and Saunders (21). A comparison of results obtained with the wheat coleoptile bioassay and GLC results suggests that ABA, if not the only inhibitor present in ether extracts of the xylem sap of willow, accounts for the largest part of its inhibitory activity.…”

Section: Resultsmentioning

confidence: 99%

Seasonal Variation in the Hormone Content of Willow

Alvim

Hewett²,

Saunders³

1976

Plant Physiol.

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Changes in levels of abscisic acid (ABA) and cytokinin activity in the xylem sap of willow (Salix viminalis, L) were folHowed throughout two growth cydes.Growth in spring was preceded by decreasing levels of ABA and an increase in cytokinin activity. The onset of dormancy was associated with low levels of cytokinins and high contents of ABA. A second peak of ABA was found in July which was not related to the dry weight of the sap. The main cytokinin activity in the sap was due to a zeatin ribosidelike compound.

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Section: Resultsmentioning

confidence: 99%

Seasonal Variation in the Hormone Content of Willow

Alvim

Hewett²,

Saunders³

1976

Plant Physiol.

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“…The physiological processes involved in bud dormancy are complex and interact with environmental cues to optimize the timing of budburst in relation to the mean long-term probability of a late spring frost. In this section, we focus on the environmental cues that affect the phenology of the primary aerial meristems of temperate and boreal trees (budburst, flowering, fruit and cone maturation, and leaf senescence) and refer to the detailed reviews of Wareing and Saunders (1971), Arora et al (2003), Horvath et al (2003), and Cooke et al (2012) for the hormonal and molecular changes involved in these phenophases.…”

Section: Phenology Of Leaves and Reproductive Structuresmentioning

confidence: 99%

Temperate and boreal forest tree phenology: from organ-scale processes to terrestrial ecosystem models

Delpierre

Vitasse

Chuine

et al. 2016

Annals of Forest Science

231

192

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Abstract& Key message We demonstrate that, beyond leaf phenology, the phenological cycles of wood and fine roots present clear responses to environmental drivers in temperate and boreal trees. These drivers should be included in terrestrial ecosystem models. & Context In temperate and boreal trees, a dormancy period prevents organ development during adverse climatic conditions. Whereas the phenology of leaves and flowers has received considerable attention, to date, little is known regarding the phenology of other tree organs such as wood, fine roots, fruits, and reserve compounds. & Aims Here, we review both the role of environmental drivers in determining the phenology of tree organs and the models used to predict the phenology of tree organs in temperate and boreal forest trees. & Results Temperature is a key driver of the resumption of tree activity in spring, although its specific effects vary among organs. There is no such clear dominant environmental cue involved in the cessation of tree activity in autumn and in the onset of dormancy, but temperature, photoperiod, and water stress appear as prominent factors. The phenology of a given organ is, to a certain extent, influenced by processes in distant organs. & Conclusion Inferring past trends and predicting future trends of tree phenology in a changing climate requires specific phenological models developed for each organ to consider the phenological cycle as an ensemble in which the environmental cues that trigger each phase are also indirectly involved in the subsequent phases. Incorporating such models into terrestrial ecosystem models (TEMs) would likely improve the accuracy of their predictions. The extent to which the coordination of the phenologies of tree organs will be affected in a changing climate deserves further research.

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“…In fact, taking into account the structural complexity of most buds, and the strong interrelationship they maintain with their shoot axis, we will show that the rest of the meristematic region and related tissues depends upon 'short distance inhibitions (SDIs) (Samish, 1954;Champagnat, 1965;Wareing and Saunders, 1971;Phillips, 1975; Saunders, 1978;Hillman, 1984). A few papers (Vegis, 1964;1965a, b; Guern and Usciati 1972;1975;Miginiac, 1974; Mcintyre, 1977) and especially recent reviews by Mauget (1987), Tamas (1987) and Powel (1987) have emphasized the necessity of setting the problem on much wider biochemical and physiological bases.…”

Section: Introductionmentioning

confidence: 99%

Rest and activity in vegetative buds of trees

Champagnat¹

1989

Ann. For. Sci.

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Hormones and Dormancy

Cited by 247 publications

References 0 publications

Seasonal Variation in the Hormone Content of Willow

Seasonal Variation in the Hormone Content of Willow

Temperate and boreal forest tree phenology: from organ-scale processes to terrestrial ecosystem models

Rest and activity in vegetative buds of trees

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