Regulation of Sucrose Metabolism in Higher Plants: Localization and Regulation of Activity of Key Enzymes

Winter, Holger

doi:10.1016/s0735-2689(01)80002-2

Cited by 222 publications

(198 citation statements)

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“…Suc can also be stored in the vacuole or be cleaved into Glc and Fru by invertases, principally for glycolysis (Trethewey et al, 1998). The relative activities of Suc synthase and invertase in sink tissues are the key determinants of C partitioning between cell wall synthesis, storage, or biosynthesis of other cell components required for growth (Winter and Huber, 2000;Koch, 2004;Coleman et al, 2009). Suc also functions as a signal that regulates metabolic pathways through changes in transcription and enzyme activities mediated through Suc-non-fermenting Related protein Kinases (Halford and Paul, 2003;McKibbin et al, 2006).…”

Section: Suc May Be a Key Regulator Of Growth And Ligninmentioning

confidence: 99%

Lignin and Biomass: A Negative Correlation for Wood Formation and Lignin Content in Trees

et al. 2010

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Section: Suc May Be a Key Regulator Of Growth And Ligninmentioning

confidence: 99%

Lignin and Biomass: A Negative Correlation for Wood Formation and Lignin Content in Trees

et al. 2010

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“…Generally, higher activities of SuSy and β-1,3-glucanase are consistently correlated with high rates cellulose deposition in coloured cotton www.scienceasia.org fibres 28 . Carbohydrate metabolism is however a complex process in coloured cotton fibre, and carbohydrates are not only used to synthesize cellulose but also to form flavonoid compounds 33 .…”

Section: Discussionmentioning

confidence: 99%

Cellulose synthesis in coloured cotton

Senhe¹,

Hong²,

Xu³

et al. 2015

ScienceAsia

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Using green, brown, and white cotton as materials, the contents of cellulose, carbohydrates, and flavonoid compounds as well as enzyme activities related to cellulose synthesis were investigated at various stages of fibre development to elucidate the characteristics of cellulose synthesis. The results showed that cellulose contents in all three cotton fibres showed 'S-shaped curve' changing patterns. According to a logistic growth model, the lower maximum accumulative rate of cellulose in the coloured cotton indicated less cellulose accumulation during fibre development. No significant differences in the carbohydrate content and carbohydrate transformation rates were observed between coloured and white cotton fibre. However, the flavonoid content in coloured cotton fibres was significantly higher than white cotton, and the flavonoid biosynthesis in coloured cotton fibres consumed a large amount of carbohydrates which should normally be used for cellulose synthesis. Low indoleacetic acid oxidase and peroxidase activities lowered cellulose accumulation in coloured cotton fibres. High activities of sucrose synthetase and β-1,3-glucanase in coloured cotton fibres may promote efficient utilization of carbohydrates. However, carbohydrate metabolism in the coloured cotton fibre should not only be responsible for cellulose biosynthesis but also for flavonoid biosynthesis.

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“…As duas fontes de carbono da semente de Sesbania virgata, portanto, levam à formação de sacarose, o que torna esse dissacarídeo um importante elemento nas relações de fonte e dreno entre os diferentes órgãos da plântula, como descrito para outras espécies (Farrar et al 2000). A própria disponibilidade de sacarose nos tecidos poderia funcionar como um sinalizador no processo, uma vez que além de fonte de energia, a própria sacarose pode atuar como um regulador direto ou indireto da expressão gênica (Winter & Huber 2000). Estudar o metabolismo de sacarose neste período tão crítico do ciclo de vida da planta, portanto, é essencial para entender as relações fonte e dreno e a alocação de recursos e uso do carbono na planta.…”

Section: Introductionunclassified

Catabolismo de sacarose durante a mobilização do galactomanano e sua importância na estratégia de sobrevivência de plântulas de Sesbania virgata (Cav.) Pers.

Molle

Tiné

2009

Hoehnea

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Catabolismo de sacarose durante a mobilização do galactomanano e sua importância na estratégia de sobrevivência de plântulas de Sesbania virgata (Cav.) Pers.Fábio Reis Dalle Molle 1 e Marco Aurélio Silva Tiné 2,3 Recebido: 14.08.2008; aceito: 16.04.2009 ABSTRACT -(Sucrose catabolism during galactomannan mobilisation and its importance in the survival strategy of Sesbania virgata (Cav.) Pers. plantlets). Seeds of Sesbania virgata have galactomannan as a storage polysaccharide in the endosperm. During mobilization, the degradation products are assimilated by the cotyledons which later supply this carbon source to the embryo. Sucrose is of prime importance in this source and sink relation between the organs. In the present work, the importance of the storage galactomannan in the establishment of plantlets of Sesbania virgata was investigated following the study of survival of plantlets with or without endosperm, as well as the diuturnal variations of the sucrose catabolism enzymes activity. The plantlets grown in the darkness with endosperm survived 16 days longer than the plantlets without the storage organ. Independent variations among the enzymes were detected, suggesting that the different enzymes are engaged in different physiological processes and, although sucrose is their common substrate, they take part in independent metabolic pathways. Key words: invertase, source-sink relations, storage, sucrose synthase RESUMO -(Catabolismo de sacarose durante a mobilização do galactomanano e sua importância na estratégia de sobrevivência de plântulas de Sesbania virgata (Cav.) Pers.). Sementes de Sesbania virgata possuem galactomanano como polissacarídeo de reserva no endosperma. Durante a mobilização, os produtos de degradação são absorvidos pelos cotilédones que, posteriormente, fornecem esse carbono ao eixo embrionário. A sacarose tem um papel fundamental nesta relação de fonte e dreno entre os órgãos. Neste trabalho, a importância da reserva de galactomanano no estabelecimento das plântulas de Sesbania virgata foi investigada através de estudo de sobrevivência de plântulas com e sem endosperma, assim como as variações diuturnas na atividade das enzimas de catabolismo de sacarose. As plântulas crescidas no escuro com endosperma sobreviveram 16 dias a mais que as plântulas sem endosperma. Foram observadas variações independentes entre as enzimas, sugerindo que as diferentes enzimas participam de diferentes processos fi siológicos e, embora tenham a sacarose como substrato em comum, participam de vias metabólicas independentes. Palavras-chave: invertase, relações fonte-dreno, reserva, sacarose sintase

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Regulation of Sucrose Metabolism in Higher Plants: Localization and Regulation of Activity of Key Enzymes

Cited by 222 publications

References 0 publications

Lignin and Biomass: A Negative Correlation for Wood Formation and Lignin Content in Trees

Lignin and Biomass: A Negative Correlation for Wood Formation and Lignin Content in Trees

Cellulose synthesis in coloured cotton

Catabolismo de sacarose durante a mobilização do galactomanano e sua importância na estratégia de sobrevivência de plântulas de Sesbania virgata (Cav.) Pers.

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