Characterization of low molecular weight fragments from gamma irradiated κ-carrageenan used as plant growth promoter

Abad, Lucille V.; Aurigue, Fernando B.; Relleve, Lorna S.; Montefalcon, Djowel Recto; Lopez, Girlie Eunice P.

doi:10.1016/j.radphyschem.2015.03.001

Cited by 29 publications

(12 citation statements)

References 8 publications

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“…According to Darvill et al (1992), the plants have the ability to recognize oligosaccharides which in turn regulates growth, development, and defense response in plants. Thus, besides OC, oligoalginate, oligo-β-glucan, and oligocarrageenan were also reported to possess growth promotion effect for plants (Abad et al, 2016;Hien et al, 2000;Luan & Uyen, 2014).…”

Section: Discussionmentioning

confidence: 99%

Effect of foliar application of oligochitosan with different molecular weight on growth promotion and fruit yield enhancement of chili plant

Dzung

Phú

et al. 2017

Plant Production Science

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Oligochitosan (OC) is effective biostimulant on growth promotion and elicitation against disease infection for plants. However, the range of OC molecular weight that exhibits the most effective activity is not fully understood and requires further investigation. In this study, OCs with different weight average molecular weight (Mw) were prepared by gamma Co-60 irradiation degradation of chitosan in solution and the effect on growth promotion and enhancement of fruit yield of chili plant (Capsicum frutescens L.) by foliar application of OCs particularly with Mw of 7.8, 5.0, and 2.5 kDa was investigated. Chili plants, cultivated in a greenhouse were sprayed with OC concentration of 50 mg/L for three times. Results indicated that among treatments, OC with 2.5 kDa proved to be the best, which increased the shoot fresh weight by 71.5%, shoot dry weight by 184%, total chlorophyll content by 12%, and fruit fresh weight by 49.8% for the control. Thus, OC with low Mw (2.5 kDa) that can be suitably produced on large scale by gamma Co-60 ray irradiation degradation of chitosan solution is potentially promising to apply as a biostimulant to enhance chili fruit yield significantly.

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Section: Discussionmentioning

confidence: 99%

Effect of foliar application of oligochitosan with different molecular weight on growth promotion and fruit yield enhancement of chili plant

Dzung

Phú

et al. 2017

Plant Production Science

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“…Gamma irradiated carrageenan (ICA) has concrete application in agriculture, used either hydroponically or through foliar sprays as plant growth promoter. As per reports, foliar application of ICA enhanced the length of root in potato [12], shoot and root length in rice [13], and increased number of leaves, shoot length and fresh weight of pechay ( Brassicarapa ) [9]. It exerts spectacular effects on physiological activities leading to enhanced productivity of plants [14–17, 10, 11].…”

Section: Introductionmentioning

confidence: 95%

Proliferating effect of radiolytically depolymerized carrageenan on physiological attributes, plant water relation parameters, essential oil production and active constituents of Cymbopogon flexuosus Steud. under drought stress

et al. 2017

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Carrageenan has been proved as potent growth promoting substance in its depolymerized form. However, relatively little is known about its role in counteracting the adverse effects of drought stress on plants. In a pot experiment, lemongrass (Cymbopogon flexuosus Steud.), grown under different water stress regimes [(100% field capacity (FC), 80% FC and 60% FC)], was sprayed with 40, 80 and 120 mg L-1 of gamma irradiated carrageenan (ICA). Foliar application of ICA mitigated the harmful effects of drought stress to various extents and improved the biochemical characteristics, quality attributes and active constituents (citral and geraniol) of lemongrass significantly. Among the applied treatments, ICA-80 mg L-1 proved the best in alleviating detrimental effects of drought. However, drought stress (80 and 60% FC), irrespective of the growth stages, had an adverse impact on most of the studied attributes. Generally, 60% FC proved more deleterious than 80% FC. At 80% FC, application of ICA-80 mg L-1 elevated the essential oil (EO) content by 18.9 and 25%, citral content by 7.33 and 8.19% and geraniol content by 9.2 and 8.9% at 90 and 120 days after planting (DAP), respectively, as compared to the deionized-water (DW) spray treatment (80% FC+ DW). Whereas, at 60% FC, foliar application of 80 mg L-1 ICA significantly augmented the EO content by 15.4 and 17.8% and active constituents viz. citral and geraniol, by 5.01 and 5.62% and by 6.06 and 5.61% at 90 and 120 DAP, respectively, as compared to the control (water-spray treatment).

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“…Preliminary results indicate an increase in yield of mungbean sprayed with irradiated -carrageenan (Abad et al, 2011). Likewise, Abad et al (2015) reported that radiation modified -carrageenan increased yield of pechay (Brassica napus var. chinensis) in terms of fresh weight.…”

Section: Results and Discussion Pgp Application On Bpi Pn 9 Pementioning

confidence: 97%

Enhancing Peanut Productivity through Application Of Irradiated - Carrageenan

Gatan*¹,

Gatan²,

Aurigue³

2019

IJRTE

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On-field verification trials were conducted to determine the effect of various rates of Olio-carrageenan (PGP) on Cercospora leaf spot (CLS) and rust and yield of peanut varieties specifically, BPI Pn9 and Farmer’s variety. The statistical design of the field trial was a Randomized Complete Block Design (RCBD) with four replicates per treatment per experiment. The CLS and rust infections were significantly reduced with the application of 150ppm PGP by 15.2% and 36.2%, respectively. The BPI Pn 9 peanut variety applied with PGP consistently and significantly had higher pod yield up to 2.14 t/ha and seed yield of 1.63 t/ha with a corresponding 37.6% and 34.5% increase, respectively. At least Php45,771 per hectare additional income was realized from the application of PGP with a maximum MBCR of 12.3%. For Farmer’s peanut variety, significant increase of 23.6% on pod yield and 36.5% on seed yield were obtained resulting to an additional income of Php 18,400/ha up to 37,800/ha with an MBCR of 21.81%

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Characterization of low molecular weight fragments from gamma irradiated κ-carrageenan used as plant growth promoter

Cited by 29 publications

References 8 publications

Effect of foliar application of oligochitosan with different molecular weight on growth promotion and fruit yield enhancement of chili plant

Effect of foliar application of oligochitosan with different molecular weight on growth promotion and fruit yield enhancement of chili plant

Proliferating effect of radiolytically depolymerized carrageenan on physiological attributes, plant water relation parameters, essential oil production and active constituents of Cymbopogon flexuosus Steud. under drought stress

Enhancing Peanut Productivity through Application Of Irradiated - Carrageenan

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