Effect of Some Growth Substances and Antimetabolites on Elongation of the First Internode in Epiphyllous Buds of Bryophyllum tubiflorum Harv.

Nanda, K. K.; Prabha, A. Lakshmi

doi:10.1086/336476

Cited by 11 publications

(3 citation statements)

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“…An increased stem elongation of plants treated with GA, has been reported by Purohit et al (1969), Shininger (1972), and Wakhloo (1975), If the elongation of the pea internode at a low level of irradiance or in darkness is caused by GA,, it would be possible to promote the elongation of the third internode and thus the subsequent root formation by GA,. The GAJ treatment ( Figure 5) revealed that only the high concentration of GAj promoted elongation of the third internode.…”

Section: Discussionmentioning

confidence: 83%

“…In many investigations on root formation, light and dark grown plant material has been used and the results obtained are explained as all or none effects mediated by light or dark (Purohit et al 1969, Taylor and Odom 1970, Oliemann et al 1971, Leroux 1965, Lovell et al 1973, Van Oostveldt et al 1976, Wakhloo 1975, However, some investigations on root formation show that the effect of the irradiance is gradual Lovell 1970, Hansen andEriksen 1974),…”

Section: Discussionmentioning

confidence: 99%

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A Relationship between Length of Basis and Adventitious Root Formation in Pea Cuttings

Veierskov¹

1978

Physiologia Plantarum

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A positive correlation between the length of the basis and the ability of the cuttings to form adventitious roots was observed in pea cuttings. Plants with a different basis length (the third internode) were obtained in different ways: Regulation by the level of irradiance, dark treatment or gibberellic acid. The length of the basis was also regulated by excision of the cuttings at different places on the stock plants. With increasing basis length an increase was found in the number of roots subsequently formed. The results were similar in cuttings from plants grown at different levels of irradiance or from dark treated plants. Optimal rooting was obtained by cutting the plants just above the second scale leaf. Cuttings from plants treated with 10−3M GA3 showed the same correlation between the length of the third internode and root formation as found in the other experiments, but the number of roots were at a lower level.

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Section: Discussionmentioning

confidence: 83%

Section: Discussionmentioning

confidence: 99%

A Relationship between Length of Basis and Adventitious Root Formation in Pea Cuttings

Veierskov¹

1978

Physiologia Plantarum

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“…In recent years there has been a rekindling of interest in this phenomenon, especially at the physiological level. The underlying mechanisms controlling the development of these structures on intact plants have been proposed by Vardar and Acarer (1957), Heide (l965a), Sironval (1956), Warden (1968Warden ( , 1969Warden ( , 1970, Dostal (1970), Purohit, Nanda and Prabha (1969), Purohit and Nanda (1971), and Chailakhyan and Frolova (1974). Factors affecting the post-initiation development have been reported by Nanda and Jain (1972), Nanda,Purohit,and Prabha(l968), and Nand a et al (1970).…”

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confidence: 96%

Hormones and Early in Vitro Development of Epiphyllous Propagules on Bryophyllum Calycinum

Karpoff

1982

American J of Botany

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Uniform leaf discs of Bryophyllum calycinum, each containing a single marginal notch, were explanted onto sterile media. These media contained the minerals and vitamins of Murashige and Skoog, 2% sucrose, and 1% agar. Hormones used included indoleacetic acid (lAA), gibberellic acid (GA), 2,4-dichlorophenoxyacetic acid (2,4-0), and benzylaminopurine (BAP). Explants were grown for I wk at which time the length of the longest leaf was measured. These observations represent the most rapid in vitro development of these isolated structures yet reported in the literature. The number of roots was also recorded and the average length of the two longest roots was calculated. BAP at concentrations of 10-6 to 10-8 M provided the only growth stimulation of the propagules observed, while 10-4 M completely inhibits roots and reduces leaf development by 60% and 10-5 M significantly decreases number and length of roots. Except at IO-a M, which was inhibitory, IAA had no effect on propagule leaf development. Concentrations of IO-a M 2,4-0 induced callus and no roots, 10-4 M induced both callus, leaves, and roots, and multiple root primordia at the notch in explants grown for 2 wk at 10-4 M. When callus formed it never arose at a cut surface, but broke through the epidermis only at the notch of the leaf. Gibberellic acid and 2,4-0 were generally inhibitory to leaf development but 10-5 M GA significantly enhanced root length. With the exception of 10-5 M GA, both 2,4-0 and GA generally inhibit both average length of longest two roots and average number of roots. Concentrations of BAP of 10-7 M and 10-8 M stimulated root production as did 10-7 M IAA and 10-7 M 2,4-0 while other concentrations of hormones used were either without effect or were inhibitory.Gibberellic acid at 10-4 M produced leaves without any of the notches typical of this species. As the concentration of the hormone was reduced to 10-5 M notches began to be formed and by 10-6 and 10-7 M normal notching was restored.

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Hormonal Regulation of Epiphyllous Bud Release and Development in Bryophyllum Calycinum

Houck

1983

American J of Botany

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The effects of various concentrations of several auxins and cytokinins separately and in combination on epiphyllous budding of Bryophyllum calycinum were investigated, using a marginal leaf strip method. The number of buds released per leaf in 10−6 m benzyladenine (BA) was 2.8 times greater than those in water, and 1.6 times greater in 10−5 m isopentyladenine (IPA). BA, IPA and kinetin were antagonistic to indoleacetic acid (IAA) or naphthaleneacetic acid (NAA) when used in combination treatments. The IAA oxidase co‐factor p‐coumaric acid (PCA) increased the number of epiphyllous buds to twice that of the water controls. This stimulatory effect of PCA on bud release suggests that an increase in IAA oxidase activity may be one of the significant changes that precedes the release of epiphyllous buds.

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Effect of Some Growth Substances and Antimetabolites on Elongation of the First Internode in Epiphyllous Buds of Bryophyllum tubiflorum Harv.

Cited by 11 publications

References 0 publications

A Relationship between Length of Basis and Adventitious Root Formation in Pea Cuttings

A Relationship between Length of Basis and Adventitious Root Formation in Pea Cuttings

Hormones and Early in Vitro Development of Epiphyllous Propagules on Bryophyllum Calycinum

Hormonal Regulation of Epiphyllous Bud Release and Development in Bryophyllum Calycinum

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