Influence of exogenous IAA and GA on seed germination, vigor and their endogenous levels in<i>Cunninghamia lanceolata</i>

Zhao, Guangyao; Zhong, Tailin

doi:10.1080/02827581.2013.783099

Cited by 20 publications

(7 citation statements)

References 22 publications

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“…Fulvic acids are demonstrated to increase the root length of wheat seeds (Qin et al, 2016) and tomato plants (Dobbss et al, 2007(Dobbss et al, , 2010 although humic extracts from hydrochar and Amazonian Dark Earth increased radicles and seminal lateral roots of maize seeds (Bento et al, 2020). The effects on root growth could be attributed to the hormone-like molecules and their auxin-and gibberellin-like effects that can promote the elongation of root cells, coleoptiles, and hypocotyls (Zhao and Zhong, 2013;Canellas et al, 2015), confirming the characteristics of our microbially fermented fulvic acids. According to Blomster et al (2011), fulvic acids enhance the activity of auxin signaling and the involved enzymes to increase the growth of roots.…”

Section: The Reasons For Increased Yield and Qualitysupporting

confidence: 66%

Dose-Dependent Application of Straw-Derived Fulvic Acid on Yield and Quality of Tomato Plants Grown in a Greenhouse

Zhang

et al. 2021

Front. Plant Sci.

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Fulvic acids are organic compounds widely distributed in soils, and the application of fulvic acids is thought to increase crop yield and quality. However, the effects vary among various sources and doses of fulvic acids and environmental and growth conditions of crops. Here, we investigated the effects of bioresource-derived (corn straw) fulvic acids on plant production and quality of tomato plants and soil chemical properties in soil cultures while experiments on seed germination and hydroponics were conducted to explore the underlying mechanism. Base dressing with 2.7 g kg–1 increased the yield of tomato by 35.0% at most as increased fruit number. Fulvic acids increased the concentrations of minerals, such as Ca, Fe, and Zn and the concentrations of citric, malic, and some amino acids in berries of tomato but did not affect the concentrations of soluble sugars and aromatic substances in tomato fruits. Similarly, fulvic acids at 80–160 mg L–1 increased germination rate, growth vigor, and radicle elongation of tomato seeds while it increased plant biomass, concentrations of nutrients, and root length of tomato plants in hydroponics to the greatest extent in general. The increases in yield and quality can be attributed to the improvement in root growth and, thus, increased nutrient uptake. In addition, the base application of fulvic acids improved soil cation exchange capacity and soil organic matter to an extent. In conclusion, base dressing and the addition into solution of fulvic acids at moderate doses facilitate root growth and nutrient uptake and, thus, vegetable production and quality; therefore, fulvic acids can be an effective component for designing new biofertilizers for sustainable agricultural production.

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Section: The Reasons For Increased Yield and Qualitysupporting

confidence: 66%

Dose-Dependent Application of Straw-Derived Fulvic Acid on Yield and Quality of Tomato Plants Grown in a Greenhouse

Zhang

et al. 2021

Front. Plant Sci.

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“…It was observed that the effect of exogenous application of plant growth regulators (PGRs) including auxin can either be neutral, promote or inhibit germination (Webber, 1987). PGRshave been reported to have influenced plant germination (Webber, 1987).For example, IAA treated seeds of Chinese fir (Cunninghamialanceolata) promote a significant germination rate and also germination index at the concentrations of 10 −4 M and 10 −5 M IAA (Zhao &Zhong, 2013). In Table 1, there werevariations in the content of chlorophyll a, chlorophyll b and total chlorophyll among the different cowpea accession plants obtained from the various concentrations of IAA germinated treated seed.…”

Section: Resultsmentioning

confidence: 99%

Influence ofIndole-3-Acetic Acid treated Cowpea (Vignaunguiculata L. Walp) Seedson germination, plant development and leaf Chlorophyll Content

Peter¹,

Michael²,

Obidimbu³

et al. 2021

JAES

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Plant growth regulators (PGRs) are natural hormones found in plant or their synthetic hormone analogues. Auxin, a type of PGRs that consist of low molecular weight organic phytohormones which influences cell division, plant growth and development. One of the common auxin types is indole-3-acetic acid (IAA) and was the first plant growth regulator to be discovered with characteristics that involved in the control of various plant growth and development.Auxins can be absorbed in tissues and transport to long distances throughout vascular tissueof a plant. Therefore, this study aimed to investigate the influence ofIAA on the treated seeds of cowpea (VignaunguiculataL.Walp) accession TVu-7, TVu-9 and TVu-1945to 50 % seed germination, seedling growth and development, and leaf chlorophyll content.The various IAA concentration used were 0mg/L, 250mg/L, 500mg/L 750mg/L and 1000mg/L. The results of this study showed the relative effect of various concentrations of IAA on seed germination, vegetative structure produced and leaf chlorophyll content. For example, increased IAA concentrations of 1000mg/L further extend the number of days to attend 50 % seed germination in the different cowpea accessions. Also, an increased concentration to 1000mg/L significantly increased the leaf chlorophyll content in the different cowpea accessions.

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“…These results are in general agreement with those obtained by Chandra et al (2007); they found that both germination and seedling growth of four cowpea genotypes were negatively affected by 0.02% (1.45 mM) SA application. On the contrary, many investigators recorded an enhancement effect on seedling growth due to pretreatment seeds with IAA (Zhao and Zhong 2013) or with SA (Anaya et al 2018). These contradictory results might be attributed to the variability in species or in applied concentration or in soaking time.…”

Section: Discussionmentioning

confidence: 97%

Effect of exogenous salicylic acid or indole acetic acid on their endogenous levels, germination, and growth in maize

El-Mergawi

El-Wahed

2020

Bull Natl Res Cent

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Background Exogenous hormone applications modify the plant growth and development by inducing changes in their endogenous contents. However, it is not clear whether the effects of exogenous hormones on growth are direct or related with changes induced in endogenous hormones. Laboratory and greenhouse experiments were conducted to study the effect of exogenous salicylic acid (SA) or indole acetic acid (IAA) on endogenous levels in soaked seeds, 5-day-old seedlings, and in vegetative growth of foliar-sprayed plants. The effects of different concentrations of two hormones on germination and growth of maize were also studied. Results The effect of presoaking maize seeds in solutions of SA or IAA (0, 0.25, 0.5, 1, and 2 mM) on their endogenous contents in soaked seeds or in 5-day-old seedlings. Soaked seeds absorbed more SA than IAA. In young seedlings, the majority of two hormones which absorbed during seed soaking remained in the residual seeds. Presoaking seeds in SA or IAA solutions suppressed the growth of 5-day-old seedlings. In the greenhouse experiment, endogenous SA and IAA increased after spraying two compounds at 0.25–2 mM, peaking 2 days after treatment then decreased on. However, plants treated with SA at 1 mM or 2 mM continued to pose higher levels of endogenous SA, 8 days later. At 20 days after treatments, all tested concentrations of two hormones significantly increased the fresh and dry weights of the whole plant. These inducing effects disappeared 40 days after spraying. Conclusion The obtained results demonstrated the changes in endogenous SA and IAA in soaked seeds, seedling, and foliar-sprayed plants due to their exogenous application. However, concentrations of two hormones did not produce any permanent enhancement effects on germination and plant growth.

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Influence of exogenous IAA and GA on seed germination, vigor and their endogenous levels inCunninghamia lanceolata

Cited by 20 publications

References 22 publications

Dose-Dependent Application of Straw-Derived Fulvic Acid on Yield and Quality of Tomato Plants Grown in a Greenhouse

Dose-Dependent Application of Straw-Derived Fulvic Acid on Yield and Quality of Tomato Plants Grown in a Greenhouse

Influence ofIndole-3-Acetic Acid treated Cowpea (Vignaunguiculata L. Walp) Seedson germination, plant development and leaf Chlorophyll Content

Effect of exogenous salicylic acid or indole acetic acid on their endogenous levels, germination, and growth in maize

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