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Metabolic changes during rooting in stem cuttings of five mangrove species

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Abstract

Vegetative propagation through rooting in stem cuttings in five tree mangroves namely Bruguiera parviflora, Cynometra iripa, Excoecaria agallocha, Heritiera fomes, and Thespesia populnea using IAA, IBA and NAA was reported. Spectacular increase in the root number was noted in the cuttings of H. fomes and C. iripa treated together with IBA (5000 ppm) and NAA (2500 ppm). The highest number of roots was obtained with IBA (2500 ppm) and NAA (500 ppm) in E. agallocha. B. parviflora and T. populnea responded better to IAA and IBA treatment. The species specific variation in the rooting response to exogenous application of auxins was reflected in the metabolic changes during initiation and development of roots in cuttings. Biochemical analysis showed increase of reducing sugar in the above-girdled tissues at initiation as well as subsequent development of roots which was further enhanced by the use of auxins. Decreases in the total sugar, total carbohydrate and polyphenols and increase in total nitrogen were recorded in the girdled tissues and the high C/N ratio at the initial stage helped in initiation of roots in all the species. Interaction of IBA and NAA promoted starch hydrolysis better than IAA and IBA during root development and subsequently reduced the C/N ratio and increased the protein-nitrogen activity during root development which suggest the auxin influenced mobilization of nitrogen to the rooting zone.

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Abbreviations

IAA:

Indole-3-acetic acid

IBA:

Indole-butyric acid

NAA:

A-naphthalene acetic acid

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Authors and Affiliations

  1. Mangrove Research Centre, Regional Plant Resource Centre, -751015, Bhubaneswar, Orissa, India

    U. C. Basak, A. B. Das & P. Das

Authors
  1. U. C. Basak
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  2. A. B. Das
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  3. P. Das
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Basak, U.C., Das, A.B. & Das, P. Metabolic changes during rooting in stem cuttings of five mangrove species. Plant Growth Regul 17, 141–148 (1995). https://doi.org/10.1007/BF00024174

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  • DOI: https://doi.org/10.1007/BF00024174

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