Tissue distribution and deposition pattern of a cellulosic parenchyma-specific protein from cassava roots

Souza, P.; Gomes-Filho, Enéas; Campos, F. A. P.

doi:10.1590/s1516-89131998000100001

Cited by 4 publications

(5 citation statements)

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“…The tubers are therefore consumed and fed to livestock as a source of starch and also used to produce tapioca starch for industrial and food use. Souza et al (1998) reported the isolation of a major protein of M r about 22 000 which was restricted to the parenchyma rather than the peel of the tuber. However, no detailed characterization of this protein was carried out and its role as a storage protein was not established.…”

Section: Regulation Of Synthesis Of Colocasia Storage Proteinsmentioning

confidence: 99%

Tuber Storage Proteins

Shewry¹

2003

Annals of Botany

243

190

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A wide range of plants are grown for their edible tubers, but five species together account for almost 90 % of the total world production. These are potato (Solanum tuberosum), cassava (Manihot esculenta), sweet potato (Ipomoea batatus), yams (Dioscorea spp.) and taro (Colocasia, Cyrtosperma and Xanthosoma spp.). All of these, except cassava, contain groups of storage proteins, but these differ in the biological properties and evolutionary relationships. Thus, patatin from potato exhibits activity as an acylhydrolase and esterase, sporamin from sweet potato is an inhibitor of trypsin, and dioscorin from yam is a carbonic anhydrase. Both sporamin and dioscorin also exhibit antioxidant and radical scavenging activity. Taro differs from the other three crops in that it contains two major types of storage protein: a trypsin inhibitor related to sporamin and a mannose-binding lectin. These characteristics indicate that tuber storage proteins have evolved independently in different species, which contrasts with the highly conserved families of storage proteins present in seeds. Furthermore, all exhibit biological activities which could contribute to resistance to pests, pathogens or abiotic stresses, indicating that they may have dual roles in the tubers.

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Section: Regulation Of Synthesis Of Colocasia Storage Proteinsmentioning

confidence: 99%

Tuber Storage Proteins

Shewry¹

2003

Annals of Botany

243

190

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“…At the molecular level, there are a few reports on genes and proteins that may play important roles in controlling cassava storage root formation and yield. Souza et al (1998) reported an isolation of a 22-kDa protein from parenchyma cells of cassava storage tubers. It was suggested that this protein could be a tuber-specific storage protein (Souza et al 1998;Shewry 2003).…”

Section: Introductionmentioning

confidence: 99%

“…Souza et al (1998) reported an isolation of a 22-kDa protein from parenchyma cells of cassava storage tubers. It was suggested that this protein could be a tuber-specific storage protein (Souza et al 1998;Shewry 2003). Unfortunately, detailed characterization of this protein and its function has not since been carried out.…”

Section: Introductionmentioning

confidence: 99%

Leaf proteomic analysis in cassava (Manihot esculenta, Crantz) during plant development, from planting of stem cutting to storage root formation

Mitprasat

Roytrakul

Jiemsup

et al. 2011

Planta

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Tuberization in cassava (Manihot esculenta Crantz) occurs simultaneously with plant development, suggesting competition of photoassimilate partitioning between the shoot and the root organs. In potato, which is the most widely studied tuber crop, there is ample evidence suggesting that metabolism and regulatory processes in leaf may have an impact on tuber formation. To search for leaf proteins putatively involved in regulating tuber generation and/or development in cassava, comparative proteomic approaches have been applied to monitor differentially expressed leaf proteins during root transition from fibrous to tuberous. Stringent cross comparison and statistical analysis between two groups with different plant ages using Student's t test with 95% significance level revealed a number of protein spots whose abundance were significantly altered (P < 0.05) during week 4 to week 8 of growth. Of these, 39 spots were successfully identified by ion trap LC-MS/MS. The proteins span various functional categories from antioxidant and defense, carbohydrate metabolism, cyanogenesis, energy metabolism, miscellaneous and unknown proteins. Results suggested possible metabolic switches in the leaf that may trigger/regulate storage root initiation and growth. This study provides a basis for further functional characterization of differentially expressed leaf proteins, which can help understand how biochemical processes in cassava leaves may be involved in storage root development.

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“…All these activities resulted in opening up of the compact structure of the cell walls through hydrolysis of the cell wall hemicellulosic polymers, pectin and mucillage layers, thereby exposing the cellulosic cell walls. With the cellulose microfibrils loosely packed (Figure 2b), this enabled access of the cellulase in the Viscozyme preparation to the cellulosic cell walls (Souza, et al, 1998). The cellulase activity resulted in fragmentation (breakdown) and hydrolysis of the cellulosic cell walls, hence releasing the trapped starch granules (Figure 3).…”

Section: Mechanism Of Cell Wall Breakdown In Freeing the Trapped Starmentioning

confidence: 99%

Complementary effects of cell wall degrading enzymes together with lactic acid fermentation on cassava tuber cell wall breakdown

Adetunji

Clou

Walford

et al. 2016

Industrial Crops and Products

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Tissue distribution and deposition pattern of a cellulosic parenchyma-specific protein from cassava roots

Cited by 4 publications

References 0 publications

Tuber Storage Proteins

Tuber Storage Proteins

Leaf proteomic analysis in cassava (Manihot esculenta, Crantz) during plant development, from planting of stem cutting to storage root formation

Complementary effects of cell wall degrading enzymes together with lactic acid fermentation on cassava tuber cell wall breakdown

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