The Control of Food Mobilization in Seeds of Dicotyledonous Plants

Davies, Howard V.; Slack, P. T.

doi:10.1111/j.1469-8137.1981.tb04566.x

Cited by 44 publications

(9 citation statements)

References 72 publications

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“…During seed germination and seedling development the composition and concentration of soluble carbohydrates changes according to the mobilization of storage materials degraded in embryonic axis, cotyledons and endosperm (Davies and Slack 1981). In our study, the major soluble carbohydrates were monosaccharides (glucose and fructose) and sucrose in seedling, and sucrose in cotyledons (Fig.…”

Section: Discussionmentioning

confidence: 50%

Application of phytohormones during seed hydropriming and heat shock treatment on sunflower (Helianthus annuus L.) chilling resistance and changes in soluble carbohydrates

Górnik

Lahuta

2017

Acta Physiol Plant

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The objective of this study was to analyze the mechanism of some physiological processes accompanying acquisition of sunflower (Helianthus annuus L.) chilling resistance due to seeds hydropriming in the presence of salicylic acid, jasmonic acid, 24-epibrassinolide followed exposition of seeds to short-term heat shock treatment. The seeds were hydroprimed at 25°C in limited amounts of water or solution of salicylic or jasmonic acid at 10 -2 , 10and 10 -4 M concentration, 24-epibrassinolide at 10 -6 , 10 -8 and 10 -10 M concentration. The seeds were incubated for 2 days, subjected to short-term heat shock (45°C, 2 h) and chilled for 21 days at 0°C. Sunflower chilling susceptibility and physiological responses were evaluated according to the inhibition of radicle growth, the inhibition of the number of lateral roots formation, the activity of catalase and changes in soluble carbohydrates in seedlings developing for 72 h at 25°C. Hydropriming and short-term heat shock application explicitly reduced inhibition of roots as well as lateral roots development by allowing the germinating seeds to recover from the growthinhibiting effects of chilling. Seeds hydropriming in solutions containing salicylic acid, jasmonic acid and 24-epibrassinolide followed heat shock treatment additionally promoted the activity of catalase and sugars metabolism, which stimulated seedlings development and alleviated the decrease of F v /F m caused by chilling conditions. These beneficial effects contributed to increased resistance of sunflower seedlings to chilling stress. The present study demonstrated that the most profitable effect on reducing negative effect of chilling may be achieved by short-term heat shock applied during hydropriming in water supplemented with 24-epiBL (10 -8 and 10 -10 M) or salicylic acid (10 -3 and 10 -4 M).

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Section: Discussionmentioning

confidence: 50%

Application of phytohormones during seed hydropriming and heat shock treatment on sunflower (Helianthus annuus L.) chilling resistance and changes in soluble carbohydrates

Górnik

Lahuta

2017

Acta Physiol Plant

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“…After lipid hydrolysis, the energy necessary for radicle emergence is divided between the storage organs, such as cotyledons and the tube axis reserves, and for early seedling growth and development (Davies and Slack, 1981). In addition, lipase activity, enzymes responsible for the hydrolysis of triglycerides, increases rapidly in the post-germination stage, and is related to the mobilization of lipids (Abigor et al, 2002;Polizelli et al, 2008;Barros et al, 2010.…”

Section: Resultsmentioning

confidence: 99%

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

et al. 2013

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Seed imbibitions is the first stage of the germination process and is characterized by the hydration of tissues and cells and the activation and/or induction of the enzymes responsible for mobilizing reserves for respiration and the construction of new cell structures. The objective of this study was to investigate the alterations in reserve substances during slow hydration of Bahia Rosewood (Dalbergia nigra) seeds in water. Seeds from two different lots (Lot I and II) were placed in saturated desiccators (95-99% RH) to hydrate at 15 and 25 °C until water contents of 10, 15, 20 and 25% were reached. At each level of hydration, changes in lipid reserves, soluble carbohydrates, starch and soluble proteins were evaluated. The mobilization of reserves was similarly assessed in both lots, with no differences being observed between the two hydration temperatures. Lipid contents showed little variation during hydration, while the contents of soluble carbohydrates and starch decreased after the 15% water content level. Soluble proteins showed a gradual tendency to decrease between the control (dry seeds) up to 25% water content.

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“…These are mobilized and used as energetic fuel for germination and post-germination growth until the seedlings are sufficiently autotrophic (DAVIES and SLACK, 1981;SILVA et al, 1998;PRITCHARD et al, 2002;BUCKERIDGE et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Histochemical aspects of reserves mobilization of Caesalpinia peltophoroides (Leguminosae) seeds during germination and seedlings early growth

et al. 2008

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-The objective of this study was to investigate reserve mobilization in Caesalpinia peltophoroides seeds during germination and initial seedling growth. The variation in these compounds was analyzed from the pre-germination period (0 to 5 days after sowing -DAS) to the total cotyledon senescence and abscission at 35 DAS. For this histochemical tests were made on cotyledons fixed in FAA50 or included in glycol-metacrylate. To follow the mobilization of the main reserve compounds, sudan III was used to detect total lipids, xylidine Ponceau to detect total proteins, lugol to detect starch and polarized light to visualize the crystals. The lipids, present in a great quantity in the cotyledon, gradually decreased in the period studied. A greater quantity of starch was observed on the 10th DAS than in the previous periods and it was totally consumed by 30 DAS. The distribution pattern and the morphology of the protein material were very modified by 10 DAS, a period during which it was intensely consumed, remaining only parietally fragments distributed, that practically disappeared at 25 DAS. The calcium oxalate druses were not consumed during the period studied, there was only crystal agglutination.Keywords: Reserve materials, carbohydrates, lipids, proteins and calcium oxalate. ESTUDO HISTOQUÍMICO DA MOBILIZAÇÃO DE RESERVAS DE SEMENTES DE Caesalpinia peltophoroides (LEGUMINOSAE) DURANTE A GERMINAÇÃO E CRESCIMENTO INICIAL RESUMO -Este trabalho teve como objetivo o estudo da mobilização de reservas de sementes de Caesalpinia peltophoroides Benth. durante a germinação e crescimento inicial das plântulas. As variações nesses compostos foram analisadas desde o período pré-germinativo (0 a 5 dias após a semeadura -DAS) até a total senescência e abscisão dos cotilédones, aos 35 DAS. Para isso, foram realizados testes histoquímicos em cotilédones fixados em FAA50 ou incluídos em glicol-metacrilato. Para acompanhamento da mobilização dos principais

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The Control of Food Mobilization in Seeds of Dicotyledonous Plants

Cited by 44 publications

References 72 publications

Application of phytohormones during seed hydropriming and heat shock treatment on sunflower (Helianthus annuus L.) chilling resistance and changes in soluble carbohydrates

Application of phytohormones during seed hydropriming and heat shock treatment on sunflower (Helianthus annuus L.) chilling resistance and changes in soluble carbohydrates

Alterations in seed reserves of Dalbergia nigra ((Vell.) Fr All. ex Benth.) during hydration

Histochemical aspects of reserves mobilization of Caesalpinia peltophoroides (Leguminosae) seeds during germination and seedlings early growth

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