Contribution of the Pentose Phosphate Pathway and Glycolytic Pathway to Dormancy Breakage and Germination of Peanut (<i>Arachis hypogaea</i>L.) Seeds

Swamy, P. M.; Sandhyarani, C. K.

doi:10.1093/jxb/37.1.80

Cited by 27 publications

(19 citation statements)

References 16 publications

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“…While the inhibiting effect of ABA on glycolysis during seed germination is a new finding, the inhibition of seed germination by glycolysis inhibitors has been already observed in pine ( Pinus laricio ) seeds 40. Furthermore, in peanut ( Arachis hypogaea ) seed after‐ripening or breakage of dormancy with kinetin leads to glycolytic enzyme activity accumulation in the embryonic axis 41. After‐ripening and loss of dormancy are known to reduce ABA levels in seeds 42.…”

Section: Discussionmentioning

confidence: 99%

Proteomics reveal tissue‐specific features of the cress (Lepidium sativum L.) endosperm cap proteome and its hormone‐induced changes during seed germination

Müller

Job

Belghazi³

et al. 2010

Proteomics

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Mature angiosperm seeds consist of an embryo surrounded by the endosperm and the testa. The endosperm cap that covers the radicle plays a regulatory role during germination and is a major target of abscisic acid-induced inhibition of germination. Cress (Lepidium sativum) is a close relative of the model plant Arabidopsis thaliana (Arabidopsis). Cress seeds offer the unique possibility of performing tissue-specific proteomics due to their larger size while benefiting the genomic tools available for Arabidopsis. This work provides the first description of endosperm cap proteomics during seed germination. An analysis of the proteome of the cress endosperm cap at key stages during germination and after radicle protrusion in the presence and absence of abscisic acid led to the identification of 144 proteins, which were clustered by the changes in their abundances and categorized by function. Proteins with a function in energy production, protein stability and stress response were overrepresented among the identified endosperm cap proteins. This strongly suggests that the cress endosperm cap is not a storage tissue as the cereal endosperm but a metabolically very active tissue regulating the rate of radicle protrusion.

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Section: Discussionmentioning

confidence: 99%

Proteomics reveal tissue‐specific features of the cress (Lepidium sativum L.) endosperm cap proteome and its hormone‐induced changes during seed germination

Müller

Job

Belghazi³

et al. 2010

Proteomics

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“…It has been postulated that the removal of dormancy and germination of different seeds involve the catabolism of glucose via the oxidative PPP (Roberts 1969, Simmonds and Simpson 1971, 1972, Hendricks and Taylorson 1975, Nicolas and Aldasoro 1979, Gosling and Ross 1980, Swamy and Sandhyarani 1986. Furthermore, a germination-stimulating effect of cyanide pretreatment has been described for seeds of different species (Roberts 1969, Taylorson and Hendricks 1973, Dziewanowska et al 1979a, Esashi et al 1979, Junttila and Nilsen 1980, Perino and Come 1981.…”

Section: Introductionmentioning

confidence: 99%

Effects of cyanide and cold treatment on sugar catabolism in apple seeds during dormancy removal

Bogatek¹,

Lewak²

1988

Physiologia Plantarum

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The ratio of glycolysis to the pentose phosphate pathway (PPP, C6/C1 ratio), and the activities of glucose 6‐phosphate dehydrogenase (EC 1.1.1.49) and pyruvate kinase (PK, EC 2.7,1.40) were determined in apple seeds (Malus domestica Borb, cv. Antonówka) submitted to cold and warm stratifications. Our results indicated that the elimination of embryonal dormancy in apple seeds was connected with a change from domination of PPP to domination of glycolysis in sugar catabolism during cold stratification. Cyanide pretreatment affected the C6/C1 ratio and the activities of the enzymes under study in such a manner that the maxima of PPP and glycolysis appeared earlier during stratification. We suggest a regulatory role of cyanide in removal of dormancy.

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“…This contradicts the findings of Betty and Finch-Savage 2 , Gui et al 11 and Swamy and Sandhyarani 22 , who found that increased activity of G6PDH was correlated with increased germination vigour of cabbage, rye, tomato and peanut seeds. This discrepancy may be due to barley having different dormancy decay and germination vigour pathways.…”

Section: G6pdh Activitymentioning

confidence: 69%

“…Glucose-6-phosphate dehydrogenase (G6PDH) is the rate-limiting enzyme of the PPP 8,25 , and increased G6PDH activity has been associated with dormancy decay and increased seed vigor of a variety of seeds. Swamy and Sandhyarani 22 found that there was a gradual increase in G6PDH activity during dry storage of dormant peanut seeds (Arachis hypogaea). They also observed a distinct increase in the G6PDH activity when the dormant seeds were treated with kinetin, a peanut seed dormancy breaking hormone 17 .…”

Section: Introductionmentioning

confidence: 99%

The Influence of Barley Storage on Respiration and Glucose-6-Phosphate Dehydrogenase During Malting

Woonton¹,

Sherkat

Maharjan

2005

Journal of the Institute of Brewing

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Malt is produced by the controlled, but limited germination of barley. To produce good quality malt, the barley employed must be able to germinate rapidly and synchronously. Dormancy is a seed characteristic that can interfere with the rapid and uniform germination of barley, thereby reducing the resultant malt quality. Various studies have shown that post harvest storage can be used to remove dormancy and enhance barley germination characteristics and malt quality. Because of its complexity, the fundamental basis of dormancy induction, maintenance and termination remain unknown. Glucose-6-phosphate dehydrogenase (G6PDH) is the rate limiting enzyme of the pentose phosphate pathway and has been associated with dormancy decay and increased seed vigor of a variety of different seeds. The aim of this study was to determine if changes in barley germination vigour were associated with respiration and /or G6PDH changes during malting. Commercially grown barley (cv. Gairdner) was obtained from various states of Australia and stored at room temperature for up to 7 months. At 1, 3 and 7 months, samples were taken and stored at -18°C. The germinative energy (GE) and germinative index (GI) of these samples were measured. Samples were micro-malted and the ␣-amylase activity, respiration rate, and G6PDH activity of the germinating grains were measured at various stages of malting. It was found that storage of barley for up to seven months significantly improved the germination characteristics and increased the ␣-amylase activity during malting. However, these improvements were not associated with concomitant changes in respiration rate or G6PDH activity during malting.

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Contribution of the Pentose Phosphate Pathway and Glycolytic Pathway to Dormancy Breakage and Germination of Peanut (Arachis hypogaeaL.) Seeds

Cited by 27 publications

References 16 publications

Proteomics reveal tissue‐specific features of the cress (Lepidium sativum L.) endosperm cap proteome and its hormone‐induced changes during seed germination

Proteomics reveal tissue‐specific features of the cress (Lepidium sativum L.) endosperm cap proteome and its hormone‐induced changes during seed germination

Effects of cyanide and cold treatment on sugar catabolism in apple seeds during dormancy removal

The Influence of Barley Storage on Respiration and Glucose-6-Phosphate Dehydrogenase During Malting

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