Physiological Studies on Flowering of Pineapple in Response to Chemicals and Environment

Biswas, S. Das; Dhua, R. S.; Mitra, S.; Bose, T. K.

doi:10.17660/actahortic.1983.137.25

Cited by 2 publications

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“…It was also observed some structural changes in the stem apex, which is transformed into an inflorescence. DAS BISWAS et al (1983) reported increases in ethylene level in the caulinar apex, in response to the use of flowering inducers, independent of their application time, but more intensively when applied in June and decreasing until January.…”

Section: Substances Used and Performancementioning

confidence: 99%

Applied aspects of pineapple flowering

Cunha

2005

Bragantia

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Flowering is an amazing, integrated and complex process of multifatorial control, which due to its great importance for agriculture has been extensively studied worldwide. Pineapple is one of the main crops on which many research works about this subject have been carried out, and it was the first one to have artificially induced flowering. However, even with all those studies, pineapple flowering is not yet characterized in many aspects. The main point for the comprehension of the physiologic aspects of flowering initiation is the identification of the factors involved in the differentiation of the apical meristem into floral primordium, as well as how these factors exert their action. This work aimed to describe the flowering process of pineapple plants, including notions about general flowering physiology, pineapple inflorescence, natural and artificial flowering. Flowering relation to several chemical substances which are involved with the vegetative growth of the plant are also discussed, in order to bring out more light on its underlying mechanisms, and also to help in crop management.Key words: Ananas comosus var. comosus, inflorescence, flowering control, plant growth regulators. RESUMO FISIOLOGIA DO FLORESCIMENTO DO ABACAXIZEIROA floração é um processo integrado, de natureza complexa. Em decorrência de sua grande importância para as plantas, muitos trabalhos têm sido desenvolvidos em todo o mundo sobre o assunto. O abacaxi é uma das principais culturas sobre cuja floração têm sido feitas diversas pesquisas, tendo sido a primeira planta a ter o florescimento induzido artificialmente. Porém, mesmo com todos esses estudos, a floração do abacaxizeiro ainda não está bem caracterizada em muitos aspectos. O principal ponto da fisiologia do florescimento consiste em se entender os fatores que atuam na transformação do meristema vegetativo em primórdio floral, e de que forma exercem suas ações. Esta revisão procura descrever o processo do florescimento do abacaxizeiro, incluindo possíveis tecnologias alternativas de indução e inibição. São abordadas, também, noções gerais de fisiologia do florescimento e da inflorescência da planta, florescimentos natural e induzido, principalmente com relação a substâncias químicas endógenas e exógenas que possuem atividade reguladora do crescimento vegetativo da planta, para melhor entendimento dos seus mecanismos e, conseqüentemente, do manejo da cultura. Palavras-chave:Ananas comosus var. comosus, floração, fatores ambientais, reguladores de crescimento.

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Section: Substances Used and Performancementioning

confidence: 99%

Applied aspects of pineapple flowering

Cunha

2005

Bragantia

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“…Flowering in the pineapple crop is a result of an interaction between endogenous inhibitors and ethylene level, this being a prerequisite for floral differentiation [8]. These authors suggested that plants artificially induced presented inhibitors until 10 days after the induction, and that an increase in the rate of floral promoter substances was observed only after 15 days.…”

Section: The 1996/1997 Experimentsmentioning

confidence: 99%

Natural flowering in pineapple: inhibition by growth regulators

Cunha

Costa

Reinhardt

2003

Fruits

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-Introduction. Natural flowering is an obstacle for the management of pineapple production. This phenomenon is at the origin of considerable and increasing fruit losses on an international scale. The objective of this work was to determine, at various times of the year, the role of substances inhibiting the vegetative growth of the plant to prevent, reduce or delay the natural pineapple flowering of the variety 'Perola', most planted in Brazil. Materials and methods. Two trials were conducted in the experimental field in Cruz das Almas, Bahia, Brasil, during the years 1996 to 1999. Various growth substances were tested at various concentrations: propionic acid 2-(3-chlorophenoxy) (ACP) at (45, 90 and 120) mg⋅L -1 , paclobutrazole (PBZ) at (77.4, 155.8 and 320) mg⋅L -1 , mepiquat chlorure (MC) at (60 and 120) mg⋅L -1 , gibberelic acid (GA 3 ) at (30 and 60) mg⋅L -1 , tebuconazole (TBZ) at (60 and 120) mg⋅L -1 and propaconazole (PPZ) at 120 mg⋅L -1 . The treatments were applied onto two, three or four split applications, every 15 days, from 7:00 to 9:00 a.m. and from April to July (the critical period for natural flowering in the region). Results and discussion. The results obtained show that ACP and PBZ are capable of inhibiting, reducing and delaying the natural flowering of pineapple with the concentrations of (90 to 240) mg⋅L -1 . The best results were obtained when the growth regulators were applied during April and May. The other products did not have an effect on the natural flowering of pineapple. Conclusion. The variation observed in the effects and efficiencies of the growth regulators used indicates the necessity of validating the best treatments under different environmental and cultural conditions. The selected growth regulators can be a valuable tool for physiological studies on the mechanisms of flowering initiation in pineapple. Brazil / Ananas comosus / flowering / precocity / growth inhibitors / triazolesFloraison naturelle chez l'ananas : inhibition par les régulateurs de croissance.

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Physiological Studies on Flowering of Pineapple in Response to Chemicals and Environment

Cited by 2 publications

References 0 publications

Applied aspects of pineapple flowering

Applied aspects of pineapple flowering

Natural flowering in pineapple: inhibition by growth regulators

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