Physiology of Flowering in Mango Studied by Grafting

Kulkarni, V. J.

doi:10.17660/actahortic.1991.291.12

Cited by 15 publications

(10 citation statements)

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“…It was concluded that sugars made in the donor leaves was the driving force moving the FP in phloem from leaves to receiver stem buds. Shading experiments to reduce photosynthate loading into the phloem also support this view (Kulkarni, 1991; R. Núñez-Eliséa, T. L. Davenport and B. Schaffer, Florida, 1991, unpublished results). The reduction of about 90% sunlight onto leaves of girdled branches on field-grown trees resulted in reduced flowering of those branches during cool, inductive periods; however, complete shading, which stopped photosynthate production entirely, mimicked defoliation during inductive conditions, resulting in a vegetative growth response.…”

Section: Tl Davenportmentioning

confidence: 81%

“…The floral stimulus is also graft transmissible (Singh, 1959(Singh, , 1962Kulkarni, 1986Kulkarni, , 1988bKulkarni, , 1991Kulkarni, , 2004. Early flowering of seedling stems was stimulated by grafting them onto mature trees or by grafting the mature stems onto juvenile plants (Singh, 1959).…”

Section: Tl Davenportmentioning

confidence: 99%

“…Some mango cultivars selected in the tropics can flower at higher temperatures than others and are not restricted to winter flowering (Kulkarni, 1991). Transfer of the FP from tropical selections to those requiring lower temperatures for induction has been accomplished using reciprocal grafts between these cultivars (Kulkarni, 1986(Kulkarni, , 1988b(Kulkarni, , 1991. Cultivars that seldom flower in warm temperature conditions were made to flower in the off season using these techniques.…”

Section: Tl Davenportmentioning

confidence: 99%

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Reproductive physiology of mango

Davenport

2007

Braz. J. Plant Physiol.

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Mango flowering involves hormonal regulation of shoot initiation and induction events resulting in reproductive shoot formation. A balance or ratio of endogenously regulated phytohormones, thought to be auxin from leaves and cytokinins from roots, appears to govern the initiation cycle independently from inductive influences. Induction of reproductive or vegetative shoots is thought to be governed by the ratio of a temperature-regulated florigenic promoter and an age regulated vegetative promoter at the time of shoot initiation. Management of off-season flowering in mango trees is being accomplished in the tropics by successfully synchronizing shoot initiation through tip pruning and use of nitrate sprays coupled with management of the stem age to induce flowering such that it can be accomplished during any desired week of the year. Key words: auxin, cytokinin, flowering management, fruiting, hormones, Mangifera indica Fisiologia da reprodução em manga: A floração em manga envolve regulação hormonal de iniciação dos ramos e eventos indutivos que levam à formação de ramos reprodutivos. Um equilíbrio ou uma relação entre fito-hormônios regulados endogenamente, supostamente auxinas das folhas e citocininas das raízes, parece governar o ciclo de iniciação independentemente de influências indutivas. Acredita-se que a indução de ramos vegetativos ou reprodutivos é governada pela relação entre um promotor florigênico regulado por temperatura e um promotor vegetativo associado à idade, durante a iniciação do ramo. Nos trópicos, o manejo da floração fora da estação das floradas tem sido feito com sucesso, pela sincronização da iniciação de ramos, mediante a remoção do ápice e uso de pulverizações com nitrato, em associação com manejo da idade do caule para induzir a floração, o que pode ser executado em qualquer época do ano.

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Section: Tl Davenportmentioning

confidence: 81%

Section: Tl Davenportmentioning

confidence: 99%

Section: Tl Davenportmentioning

confidence: 99%

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Reproductive physiology of mango

Davenport

2007

Braz. J. Plant Physiol.

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“…Bud break was either simultaneous in all the buds, in the month of January or bud break was continuous throughout the flowering season from January to March. This is possible because the flowering process in mango is regulated by several interacting pathways and factors, such as photoperiod, temperature, carbon to nitrogen ratio, and endogenous hormone levels, which are all closely associated with genes (Chacko 1991;Kulkarni 1991;Ram 1999;Shü 1999).…”

Section: Discussionmentioning

confidence: 99%

“…The observed significant differences in the number of healthy panicles in control trees between the two years under study (Table 3) further proves this assumption. The number of buds emerging/ tree is again regulated by several interacting pathways and factors such as the carbon to nitrogen ratio and endogenous hormone levels, which are all again closely associated with genes (Chacko 1991;Kulkarni 1991;Ram 1999;Shü 1999).…”

Section: Discussionmentioning

confidence: 99%

Antifungal activity of Datura stramonium, Calotropis gigantea and Azadirachta indica against Fusarium mangiferae and floral malformation in mango

et al. 2009

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Floral malformation caused by Fusarium mangiferae is a serious threat to mango cultivation in various countries. Different long-term measures suggested to control it were found to be unsuccessful. Present studies clearly showed strong antifungal activity of a concoction brewed from Datura stramonium, Calotropis gigantea, Azadirachta indica (neem) and cow manure (T 1 ) followed by methanol-water (70/ 30 v/v) extracts of Datura stramonium, Calotropis gigantea and Azadirachta indica (T 2 ) against Fusarium mangiferae. Optimal control of floral malformation was found in trees sprayed with T 1 followed by T 2 at bud break stage and again at fruit set stage when compared with the control. All the malformed buds or panicles completely dried two days after foliar spray with T 1 or T 2 . In the trees treated with T 1 at fruit set stage, flower abscission was observed from the fourth day after spraying and all flowers dropped by the ninth day without requiring any manual de-blossoming, whereas in the control, the malformed panicles remained green and competed with the growing fruits for plant nutrients. In vitro culture of fresh malformed tissues in MS media along with T 1 or T 2 showed no growth of any fungus in the media. However, in vitro culture of the completely dry malformed tissues in MS media after foliar treatment with T 1 or T 2 revealed growth of F. mangiferae on the twenty fifth day indicating that the concoction-brewed compost (T 1 ) or methanol-water (70/30 v/v) extracts (T 2 ) could not completely eliminate the pathogen but helped in controlling malformation by suppressing the activity of F. mangiferae. Mango trees sprayed with T 1 and T 2 revealed significant differences in percent fruit set and retention when compared with the control. This could be due to observed higher levels of nitrogen, phosphorus, potassium, calcium, magnesium, copper, zinc, iron and manganese in T 1, followed by T 2 when compared with T 3 (control). Among the different fruit quality parameters analysed, the total flavonoids were found to be significantly higher in T 1 and T 2 when compared with T 3. The study proved that the concoction-brewed compost (T 1 ) is effective, inexpensive, easy to prepare and constitutes a sustainable and eco-friendly approach to control floral malformation in mango when it is sprayed at bud break stage and again at fruit set stage.In this present study, exogenous treatment of emerging buds with (T c ) further proved that with increase in the number of malformed panicles/tree the number of buds developing into healthy panicles/tree decrease.

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Effect of leaf age, duration of cool temperature treatment, and photoperiod on bud dormancy release and floral initiation in mango

Núñez-Elisea

Davenport

1995

Scientia Horticulturae

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Physiology of Flowering in Mango Studied by Grafting

Cited by 15 publications

References 0 publications

Reproductive physiology of mango

Reproductive physiology of mango

Antifungal activity of Datura stramonium, Calotropis gigantea and Azadirachta indica against Fusarium mangiferae and floral malformation in mango

Effect of leaf age, duration of cool temperature treatment, and photoperiod on bud dormancy release and floral initiation in mango

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