Auxin-like effect of humic substances extracted from faeces of Allolobophora caliginosa and A. rosea

Nardi, Serenella; Panuccio, Maria Rosaria; Abenavoli, Maria Rosa; Muscolo, Adele

doi:10.1016/0038-0717(94)90215-1

Cited by 71 publications

(39 citation statements)

References 28 publications

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“…These have not undergone the strong humification processes which have occurred in the other materials (Table 1) and are, as indicated by several authors (Dell'Amico et a1 1994;Nardi et al 1994) precisely those with a higher degree of bioactivity. In the humic substances from the more evolved materials, the active fraction probably only constitutes a small percentage of the total product, which would explain why higher amounts are more effective in stimulating the germination process.…”

Section: Resultsmentioning

confidence: 86%

Effect of Humic Fractions from Urban Wastes and Other More Evolved Organic Materials on Seed Germination

Ayuso¹,

Hernández²,

Garcı́a³

1996

J Sci Food Agric

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The effect of different amounts of humic fractions obtained from urban wastes (sewage sludge and compost) on seed germination (barley, watercress and tobacco) has been compared with that of humic derived from more evolved organic materials (leonardite and peat) and a commercial humic acid fractions. Results demonstrated that the humic fractions from urban wastes had a more irregular effect on seed germination than those proceeding from more humified organic materials. Humic substances had a more positive effect on germination than humic acids, those effects depending on the nature of the original organic materials. The stability of the original organic materials (urban wastes or evolved organic materials) was a determinant factor of the behaviour of humic fractions on the germination process.

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Section: Resultsmentioning

confidence: 86%

Effect of Humic Fractions from Urban Wastes and Other More Evolved Organic Materials on Seed Germination

Ayuso¹,

Hernández²,

Garcı́a³

1996

J Sci Food Agric

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“…Pretreatment of carrot cells with unconjugated IAA or LMS humic fraction markedly reduced the fl uorescein staining of both FITC -IAA and FITC -LMS humic fraction, giving indirect evidence of the possible binding site of LMS humic fraction to the IAA cell membrane receptors. Nardi et al (1994) , by using two inhibitors of auxin (TIBA = 2,3,5 -triiodobenzoic acid and PCIB = 4 -chlorophenoxy -isobutyric acid), demonstrated in Nicotiana plumbaginifolia that the LMS component of humic matter is the fraction endowed with auxin -like activity, although the pathways followed by IAA and the LMS fraction in inducing their effects may be somewhat different. Humic matter, IAA, and IAA inhibitors stimulated peroxidase activity in tobacco.…”

Section: Effects Of Humic Substances On Biochemical Pathways and Procmentioning

confidence: 99%

Biological Activities of Humic Substances

Nardi

Carletti

Pizzeghello

et al. 2009

Biophysico‐Chemical Processes Involving Natural Nonliving Organic Matter in Environmental Systems

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“…Earthworms in nature produce several effective humic substances (Cacco and Agnola, 1984;Nardi et al, 1994;Masciandaro et al, 1997). Humus is a complex material formed during the breakdown of organic matter.…”

Section: Introductionmentioning

confidence: 99%

Micropropagation of B. monnieri using humin media in plant tissue culture

2017

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Humus is a complex material formed during the breakdown of organic matter. Earthworm castings contain a high percentage of humus. These humic substances are capable of improving plant nutrition and growth, reminiscent of hormones. Residue obtained after acid-base treatment of vermicompost was used as plant tissue culture media for the micropropagation of Bacopa monnieri. Tukey's Studentized Range (HSD) Test has clearly indicated that development of leaves from nodes was significantly higher in humin alone without any supplements. The F value was 5.5 and Pr > F was 0.0087. The weight of the plantlets (in milligrams) was significantly higher in the humin medium and humin supplemented with vitamins and micronutrients but was least in the humin medium with growth regulators. The difference observed was at the level of < 0. 0001. The explant development on humin alone has shown the significant percentage survival of in vitro micropropagated plantlets when compared with other treatments. Explants responded maximum to humin only but not so on adding the supplements and the level of significance was at Pr > F was < 0.0001. The maximum growth stimulatory effect was found in aqueous extract of vermicompost which can be made out from the Student's t-test performed to compare the means of weight of plantlets grown on humin and vermicompost extract media with and without chemical supplements respectively. The probability of this result, assuming the null hypothesis is 0.0014.

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Auxin-like effect of humic substances extracted from faeces of Allolobophora caliginosa and A. rosea

Cited by 71 publications

References 28 publications

Effect of Humic Fractions from Urban Wastes and Other More Evolved Organic Materials on Seed Germination

Effect of Humic Fractions from Urban Wastes and Other More Evolved Organic Materials on Seed Germination

Biological Activities of Humic Substances

Micropropagation of B. monnieri using humin media in plant tissue culture

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