scholarly journals Simulation of dry matter production and distribution in cassava (Manihot esculenta Crantz).

1990 ◽  
Vol 38 (2) ◽  
pp. 159-173 ◽  
Author(s):  
H. Gijzen ◽  
H.J. Veltkamp ◽  
J. Goudriaan ◽  
G.H. de Bruijn
Keyword(s):  
Curve Fitting ◽  
Manihot Esculenta ◽  
Dry Matter ◽  
Maintenance Respiration ◽  
Manihot Esculenta Crantz ◽  
Physiological Processes ◽  
Matter Production ◽  
Production And Distribution ◽  
Stems And Leaves ◽  
Using Data

The DM production of a number of cassava cultivars was simulated with a modified version of the SUCROS model. The overall behaviour of the model was validated with data from periodic harvests. The costs of maintenance respiration of stems and leaves were adjusted by curve fitting using data from one of the experiments. Agreement between experimental and model results was generally good. The model describes basic physiological processes and can be used to simulate growth of different cultivars in various climates. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Dry matter production and distribution in three cassava (Manihot esculenta Crantz) cultivars during the second vegetative plant cycle

2008 ◽  
Vol 51 (6) ◽  
pp. 1079-1087 ◽  
Author(s):  
Edvaldo Sagrilo ◽  
Pedro Soares Vidigal Filho ◽  
Manoel Genildo Pequeno ◽  
Maria Celeste Gonçalves-Vidigal ◽  
Marcus Vinícius Kvitschal
Keyword(s):  
Vegetative Growth ◽  
Manihot Esculenta ◽  
Dry Matter ◽  
Storage Roots ◽  
Manihot Esculenta Crantz ◽  
Vegetative Plant ◽  
Matter Production ◽  
Production And Distribution ◽  
Vegetative Cycle ◽  
The Relationship

A study was carried out in Araruna County, State of Paraná, to understand the relationship between the total dry matter yield and its proportion allocated to the storage roots of cassava (Manihot esculenta Crantz) plants in the second vegetative cycle. The experimental design was a randomized complete block in split-plot scheme with four replications. The plots consisted of the Mico, IAC 13 and IAC 14 cultivars and the monthly harvesting dates were assessed in the sub-plots. The results showed that the Mico and IAC 13 cultivars were more efficient in allocating dry matter to the storage roots. The IAC 14 cultivar allocated a higher proportion of assimilates to stems compared with the other two cultivars. With regard to the influence of harvesting time, the lowest harvest indexes were observed in the periods of more intense vegetative growth. However, the highest carbohydrate proportions were allocated to the storage roots during periods of low vegetative growth.

scholarly journals Effect of mosaic virus diseases on dry matter content and starch yield of five cassava (Manihot esculenta Crantz) accessions in Ghana

2013 ◽  
Vol 12 (27) ◽  
pp. 4310-4316 ◽  
Author(s):  
Elegba Wilfred ◽  
S Appiah rew ◽  
Azu Elaine ◽  
Afful Nusrat ◽  
K S Agbemavor Wisdom ◽  
...  
Keyword(s):  
Mosaic Virus ◽  
Manihot Esculenta ◽  
Dry Matter ◽  
Matter Content ◽  
Dry Matter Content ◽  
Virus Diseases ◽  
Manihot Esculenta Crantz ◽  
Starch Yield

scholarly journals Starch and flour extraction and nutrient composition of tuber in seven cassava accessions

2013 ◽  
Vol 10 (2) ◽  
pp. 217-222 ◽  
Author(s):  
MSA Fakir ◽  
M Jannat ◽  
MG Mostafa ◽  
H Seal
Keyword(s):  
Hydrogen Cyanide ◽  
Manihot Esculenta ◽  
Crude Protein ◽  
Dry Matter ◽  
Raw Materials ◽  
Starch Content ◽  
Staple Food ◽  
Manihot Esculenta Crantz ◽  
Crude Fiber Content ◽  
Cassava Plant

Cassava (Manihot esculenta Crantz) roots (tubers) are used as staple food. Starch extracted from tubers is widely utilized as raw materials in industries. Dry matter (DM) content, starch and flour extraction and proximate composition were investigated in seven cassava accessions (Coc-A1, Kh-A2, Cow-A3, Sa-A4, Me-A5, Va-A6 and Sy-A8.) in 2010- 2011. Leaf DM varied from 20.51% in Me-A5 to 29.01% in Sy-A8; that of stem from 27.24% in Va-A6 to 32.10% (average of Sy-A8, Me-A5 and Sa-A4); and that of tuber from 37.30% in Kh-A2 to 45.26% in Sy-A8. Starch was extracted by blending chopped tuber followed by decantation. Tubers were sliced, sun dried and milled into flour. Tuber starch content (fresh wt. basis) varied between 15.04% in Sy-A8 and 24.97% (average of Coc-A1 and Me-A5); that of peel from 4.54% in Va-A6 to 5.85% in Coc-A1. Crude protein varied from 1.80% (average of Kh-A2, Cow-A3 and Sy-A8) to 4.53% in Va-A6. Crude fiber content varied from 1.95% (average of Sa-A4 and Coc-A1) to 4.27% in Cow-A3. Cyanogens present in cassava plant escape as hydrogen cyanide (HCN) during harvesting and processing. Variation for HCN existed and it was 140.95 mg/kg fresh tuber (average of Sy-A8 and Coc-A1) to 546.0 mg/kg fresh tuber in Va-A6. There was no detectable HCN in the extracted flour and starch. It may be concluded that genetic variation for DM, starch, protein and HCN existed in seven cassava accessions, and Coc-A1 may be a better one due to its lower HCN, higher DM and starch content. DOI: http://dx.doi.org/10.3329/jbau.v10i2.14698 J. Bangladesh Agril. Univ. 10(2): 217-222, 2012

scholarly journals RICE SEEDLING PERFORMANCE TREATED WITH GIBBERELLIC ACID AT DIFFERENT TEMPERATURES

2020 ◽  
Vol 22 (2) ◽  
pp. 84-90
Author(s):  
Luis Osmar Braga Schuch ◽  
Ivan Ricardo Carvalho ◽  
Cristian Troyjack ◽  
João Roberto Pimentel ◽  
Nata Balsan Moura ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Acid Concentration ◽  
Dry Matter ◽  
Rice Seedling ◽  
Rice Cultivars ◽  
Rice Seedlings ◽  
Physiological Processes ◽  
Matter Production ◽  
Different Temperatures ◽  
Over Time

This work aimed to evaluate the initial performance of seedlings originated from seeds of rice cultivars treated with gibberellic acid and exposed to different growth temperatures. The cultivars SCS - 112, BRS 7-TAIM, BR IRGA 410 and IRGA 417 were used, soaked in concentrations of gibberellic acid of 0; 150; 300; 450; 600 and 750 mg L-1 and taken into germinator under temperatures of 15; 20 and 25oC. The evaluations were performed in relation to shoot and root of rice seedlings at 3; 7 and 21 days after sowing. The cultivars showed different dry matter production of shoot and root as gibberellic acid concentration, temperature and time of evaluation. The better initial performance of seedlings exposed to gibberellic acid shows the higher expression of the rice seeds vigor and demonstrates the superiority in efficiency of different physiological processes involved in the resumption of growth the embryo. Thus, gibberellic acid favors the growth of the rice seedlings over time.

scholarly journals CRESCIMENTO VEGETATIVO DO QUIABEIRO EM FUNÇÃO DA SALINIDADE DA ÁGUA DE IRRIGAÇÃO

Irriga ◽  
2001 ◽  
Vol 6 (2) ◽  
pp. 48-53
Author(s):  
Alexandre Paiva da Silva ◽  
Clodoaldo Júnior Oliviera Santos ◽  
João Batista dos Santos ◽  
Lourival Ferreira Cavalcante
Keyword(s):  
Water Availability ◽  
Vegetative Growth ◽  
Dry Matter ◽  
Saline Water ◽  
Abelmoschus Esculentus ◽  
Matter Production ◽  
Salinity Water ◽  
Stems And Leaves ◽  
Irrigation Levels ◽  
E Mail

CRESCIMENTO VEGETATIVO DO QUIABEIRO EM FUNÇÃO DA SALINIDADE DA ÁGUA DE IRRIGAÇÃO  Alexandre Paiva da SilvaClodoaldo Júnior Oliveira SantosJoão Batista dos SantosPós Graduação em Manejo de Solo e Água/Universidade Federal da Paraíba - CEP: 58397-000, Areia-PB. E-mail: [email protected] Ferreira CavalcanteDepartamento de Solos e Engenharia Rural/Centro de Ciências Agrárias-UFPB.CEP:58397-000. Areia-PB. E-mail: [email protected]  1 RESUMO O trabalho foi realizado em abrigo protegido do CCA/UFPB-Campus III, Areia-PB, com o objetivo de avaliar os efeitos da salinidade da água de irrigação e conteúdos de água disponível do solo sobre o crescimento vegetativo do quiabeiro, Abelmoschus esculentus L. Os tratamentos foram distribuídos em blocos casualizados com três repetições e duas plantas por parcela, arranjados num fatorial 5 x 2, referentes aos valores de salinidade da água 0,5; 1,5; 3,0; 4,5 e 6,0 dS m-1 e aos níveis de 80 e 100% da água disponível do solo. Os resultados evidenciaram que o aumento da salinidade da água de irrigação provocou reduções significativas sobre o crescimento em altura, diâmetro do caule, área foliar e rendimento biológico das raízes, caules e folhas das plantas, independente de serem irrigadas ao nível de 80 e 100% da água útil ou disponível do solo. UNITERMOS: salinidade, água disponível, Abelmoschus esculentus L.  SILVA, A.P., SANTOS, C.J.O., SANTOS, J.B., CAVALVANTE, L.F. VEGETATIVE GROWTH OF OKRA AS FUNCTION OF SALINITY WATER IRRIGATION  2 ABSTRACT This study was carried out in order to evaluate the effects of water salinity irrigation and content of availability water into soil on vegetative growth in okra plants, Abelmoschus esculentus L. The treatments were distributed in randomized blocks in factorial design 5 x 3 referring to salinity water irrigation levels: 0.5; 1.5; 3.0, 4.5 and 6.0 dS m-1 and 80 and 100% of availability water level into soil. The data showed that increment of salinity of water decreased the plants growth in height, stem diameter, leaf area and dry matter production by roots, stems and leaves of plants irrigated with water volums at level of 80 and 100% of water availability into soil. KEYWORDS: saline water, soil water availability, Abelmoschus esculentus L.

scholarly journals Studies toward the identification of transcription factors in cassava storage root

2003 ◽  
Vol 15 (3) ◽  
pp. 167-170 ◽  
Author(s):  
Cláudia Regina Batista de Souza ◽  
Elionor Rita Pereira de Almeida ◽  
Luiz Joaquim Castelo Branco Carvalho ◽  
Eugen Silvano Gander
Keyword(s):  
Transcription Factor ◽  
Transcription Factors ◽  
Manihot Esculenta ◽  
Plant Traits ◽  
Storage Root ◽  
Brazil Nut ◽  
Manihot Esculenta Crantz ◽  
Physiological Processes ◽  
Cassava Storage Root

Transcription factors play important roles in several physiological processes. In recent years many transcription factors have been isolated from plants and they are emerging as powerful tools in the manipulation of plant traits. In this work we initiated studies in order to isolate transcription factors from cassava (Manihot esculenta Crantz), an important tropical and subtropical crop. Our results show three kinds of proteins expressed differentially in cassava storage root and immunologically related to the opaque-2 transcription factor from maize. Southwestern experiments showed two proteins capable of interacting in vitro with the DNA sequence of the be2S1 gene from the Brazil nut tree.

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