Physiology of Flowering

Searle, Norman E.

doi:10.1146/annurev.pp.16.060165.000525

Cited by 35 publications

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“…This study extends the observation that one of the earliest indications of the transition of higher plants from vegetative to reproductive growth is an increased DNA content or synthesis in buds (3,4,6,17,26,33,35) to excised tobacco stem segments by showing that their capacity to flower in vitro is correlated with their DNA content at the time of excision. Experiments are in progress to test whether DNA extracted from F is specific for flowering.…”

Section: Discussionsupporting

confidence: 80%

Flower Formation in Excised Tobacco Stem Segments

Wardell¹,

Skoog²

1973

Plant Physiol.

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A method has been developed that extracts DNA from stem tissue of flowering tobacco plants, Nicotiana By in vitro cultivation of excised stem segments, flowering tobacco plants have been shown to have a pronounced apex to base gradient in the capacity to form floral buds (1, 2), which truly reflects a difference in the capacity to flower and not merely a decrease in the over-all capacity to form buds (32). Appropriate exogenous supplies of IAA effected a transition from floral to vegetative bud formation in such segments (31).

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Section: Discussionsupporting

confidence: 80%

Flower Formation in Excised Tobacco Stem Segments

Wardell¹,

Skoog²

1973

Plant Physiol.

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“…Searle (1965) stated in general that flower induction of photo periodically sensitive plants is controlled by florigen which is produced in leaves and transported to buds. Florigen was described to play a positive role in activating genes or a negative one, blocking gene-repressors.…”

Section: End Of Flowering and Days To Initial Petal Fallmentioning

confidence: 99%

Blooming Behavior of Exotic Apple Cultivars under North Himalayan Region of India

Pandit¹,

Wani²,

Dar³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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“…These findings have been reviewed in articles regularly published in the Annual Review of Plant Physiology (56,62, lOS,112,116,165,172), in detailed reviews published in the Encyclopedia of Plant Phys iology, Volume 16 (119,139,140,153), as well as in other articles and books (34,76,86,107,166,197,204). The present state of the problem has been fundamentally outlined by Lang (109) An answer to the first question can be found in the realm of phenomena where both genetic factors and plant reactions to environmental conditions play a decisive role.…”

Section: Timiryazev Institute Of Plant Physiology Academy Of Sciencementioning

confidence: 99%

Internal Factors of Plant Flowering

Chaĭlakhyan¹

1968

Annu. Rev. Plant. Physiol.

102

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Access provided by 34.215.51.103 on 05/13/18. For personal use only. Quick links to online contentFurther ANNUAL REVIEWS INTERNAL FACTORS OF PLANT FLOWERING1By MIKHAIL KH. CHAILAKHYAN Timiryazev Institute of Plant Physiology, Academy of Sciences, MoscowThe individual development or the ontogenesis of plants, which begins with the ovary's fertilization or with formation of an embryonic bud and ends with death, comprises the whole cycle of the plant's life and includes all its life processes. The transition of plants from vegetative growth to flowering, when new progeny develops in tissues of the maternal plant, is the most essential period in ontogenesis. The physiological nature of the transformations which precede and condition the formation and develop ment of floral organs is the main subject of this paper.The morphological picture of flower development, outlined in the theory of metamorphosis by the great poet and botanist Goethe, who thought of a flower as a transformed leaf shoot, is now widely recognized and has been developed by numerous scientists (182). The physiology of processes which precede the development of a flower has not been studied as well; the pic ture is vague and contradictory though the earliest conj ectures go back as far as the second half of the last century. And if anybody were asked to name a phenomenon of plant life where the gap between morphology and physiology is the widest, he would certainly indicate flowering.Sachs's hypothesis (162) on plant-forming and especially on flower-form ing substances, which was first published in 1880, was the earliest concept of the physiological nature of plant flowering. Klebs's theory (95) of the role of the ratio of nutrients appeared much later (in 1918). A new phase in the study of the physiological nature of the flowering phenomenon began immediately. In 1918, Gassner (70) found that winter forms require cold and that they differ in this requirement from spring forms; he discovered the phenomenon of thermo induction in plants while in 1920 Garner & Al lard (69) discovered photoperiodism in plants.During the half century that has passed since that time, the physiology of flowering became enriched with new basic data and with essential theo retical conclusions. These findings have been reviewed in articles regularly published in the Annual Review of Plant Physiology (56,62, lOS,112,116,165,172), in detailed reviews published in the Encyclopedia of Plant Phys iology, Volume 16 (119,139,140,153), as well as in other articles and books (34,76,86,107,166,197,204). The present state of the problem has been fundamentally outlined by Lang (109) An answer to the first question can be found in the realm of phenomena where both genetic factors and plant reactions to environmental conditions play a decisive role. Under common natural conditions,fiowering of seed plants takes place after the formation of vegetative organs or, more pre cisely, after they have passed the young age or juvenile stage. The duration of the juvenile period in many plants dep...

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Physiology of Flowering

Cited by 35 publications

References 0 publications

Flower Formation in Excised Tobacco Stem Segments

Flower Formation in Excised Tobacco Stem Segments

Blooming Behavior of Exotic Apple Cultivars under North Himalayan Region of India

Internal Factors of Plant Flowering

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