scholarly journals COMPORTAMENTO DE GENÓTIPOS DE ALGODÃO HERBÁCEO EM FUNÇÃO DA SALINIDADE DO SOLO.

Irriga ◽  
2001 ◽  
Vol 6 (2) ◽  
pp. 75-81
Author(s):  
Sérgio Oliveira Pinto de Queiroz ◽  
Leonardo Theodoro Bull
Keyword(s):  
Gossypium Hirsutum ◽  
Leaf Area ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Soil Conditions ◽  
Gossypium Hirsutum L ◽  
Matter Production ◽  
Root Relation ◽  
Relative Water ◽  
Specific Influence

COMPORTAMENTO DE GENÓTIPOS DE ALGODÃO HERBÁCEO EM FUNÇÃO DA SALINIDADE DO SOLO.  Sérgio Oliveira Pinto de QueirozDoutorando, Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola, Departamento de Água e Solos, Campinas, SP, CEP 13093.970,Cx. Postal 6011, tel.: (019) 3788 1029, fax: (019) 3788 1010.Leonardo Theodoro BüllProfessor Titular, D. Sc., Departamento de Recursos Naturais, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Fazenda Experimental Lageado, Botucatu, SP, CEP 18603 970, Cx. Postal 237, telefax: (14)6802 7169.  1 RESUMO O objetivo do presente estudo foi avaliar algumas variáveis fisiológicas de cinco cultivares de algodão (Gossypium hirsutum, L.) expostos à condições salino-sódicas do solo e a influência específica do sódio sobre os cultivares ACALA 1, PRECOCE 1, IAC 19, IAC 20 e EPAMIG 4.O experimento foi conduzido em casa de vegetação, sendo utilizados vasos plásticos com 8,5 kg de terra, nos quais foi aplicado NaCl, em quantidades suficientes para aumentar o  nível de condutividade elétrica de 0 para 8, 16 e 24 dS. m-1 a 25º C.  Em cada vaso foram aplicados 150 mg kg-1 de fósforo, além de solução nutritiva contendo 30 mg kg-1 de N e 40 mg kg-1 de K aos 15, 30 e 45 dias e semanalmente os vasos receberam solução diluída de micronutrientes.Os parâmetros fisiológicos avaliados foram altura de plantas, produção de matéria seca, relação parte aérea/raiz, área foliar, teor de clorofila, potencial de água na folha, índice refratométrico e teor relativo de água nas folhas.Os resultados evidenciaram que a elevação na concentração de sódio na solução do solo, reduziu a altura das plantas, a produção de matéria seca e a área foliar de todos os cultivares de algodão. UNITERMOS: algodão, cultivares, salinidade, sódio, fisiologia.  QUEIROZ, S.O.P., BÜLL, L.T.  BEHAVIOR OF GENOTYPES OF HERBACEOUS COTTON IN FUNCTION OF THE SALINITY OF  SOIL  2 ABSTRACT The objective of this research was to study some physiologic variables  of five cotton cultivars (Gossypium hirsutum, L.) exposed to saline-sodic soil conditions and the specific influence of  sodium on cultivars Acala 1, Precoce 1, IAC 19, IAC 20 and EPAMIG 4.The experiment was conductes at greenhouse. The soil air-dried (8.5 kg) was packed in plastic vase, in which NaCl was applied to reach different electric conductivity (8, 16 and 24 dS . m -1). In all vases were applied 150 mg.kg-1 of P, besides nutritious solution contends 30 mg.kg-1 of N  and 40 mg.kg-1 of K (KCl) to the 15, 30 and 45 days. Also it was applied diluted micronutrient solution weekly.The evaluated physiologic variables were: height of plant, dry matter production, shoot/root relation, leaf area, chlorophyll content, water potential in leaf, refratometric index  and relative water content in leaves.The results  showed increase jon the concentration of sodium in the soil solution, reduction of the plants height, dry matter production and leaf area in all cotton cultivars. KEYWORDS: cotton, cultivars, salinity, sodium, physiology.

scholarly journals ABSORÇÃO DE CÁTIONS E PRODUÇÃO DE MATÉRIA SECA POR GENÓTIPOS DE ALGODÃO SOB CONDIÇÕES SALINAS.

Irriga ◽  
2001 ◽  
Vol 6 (3) ◽  
pp. 104-110
Author(s):  
Sérgio Oliveira Pinto de Queiroz ◽  
Leonardo Theodoro Bull
Keyword(s):  
Gossypium Hirsutum ◽  
Dry Matter ◽  
Sodium Absorption ◽  
Gossypium Hirsutum L ◽  
Matter Production ◽  
Diluted Solution ◽  
Cotton Genotypes ◽  
Calcium Magnesium ◽  
E Mail ◽  
Specific Influence

ABSORÇÃO DE CÁTIONS E PRODUÇÃO DE MATÉRIA SECA POR GENÓTIPOS DE ALGODÃO SOB CONDIÇÕES SALINAS.  Sérgio Oliveira Pinto de QueirozDoutorando, Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Departamento de Água e Solos, Campinas, SP,  Bolsista CNPq. CEP 13093.970,Cx. Postal 6011, tel.: (19) 788 1029, fax: (19) 788 1010.E-mail: [email protected] Theodoro Büll Faculdade de Ciências Agronômicas UNESP -  Departamento de Recursos Naturais,  Fazenda Experimental Lageado, Botucatu, SP. CEP 18603 970, Cx. Postal 237, telefax: (14)6802 7169.E-mail: [email protected]  1 RESUMO Este estudo foi conduzido com o objetivo de estudar a tolerância aos sais de cinco cultivares de algodão (Gossypium hirsutum, L.): Acala 1, Precoce 1, IAC 19, IAC 20 e Epamig 4, além de avaliar a influência específica do sódio na absorção de cátions nutrientes. O experimento foi conduzido em casa de vegetação, utilizando-se vasos plásticos contendo 8,5 kg de terra, na qual foi aplicado NaCl  em quantidades suficientes para elevar o  nível  de condutividade elétrica  de  0 para próximos de 8, 16 e 24 dS . m-1 a 25° C. Todos os vasos receberam aplicações de 150 mg P. kg-1 solo, solução nutritiva contendo 30 mg N e 40 mg K . kg-1 solo e, semanalmente, solução diluída de micronutrientes.O solo foi avaliado pela Relação de Adsorção de Sódio (RAS) e Relação de Sódio Trocável (RST), através de amostras coletadas dos vasos, ao final do experimento.Pelos dos resultados constatou-se que a elevação na concentração de sódio na solução no solo, além de reduzir o potencial osmótico da solução do solo, reduziu a absorção de potássio, cálcio e magnésio e a produção de matéria seca por todos os cultivares de algodão. UNITERMOS: algodão, salinidade, sódio.  QUEIROZ, S.O.P., BÜLL, L.T. CATION ABSORPTION AND DRY MATTER PRODUCTION BY COTTON GENOTYPES UNDER SALINITY CONDITIONS  2 ABSTRACT This study was carried out in order to evaluate the tolerance to salt by five cultivars of cotton (Gossypium hirsutum, L.): Acala 1, Precoce 1, IAC 19, IAC 20 and Epamig 4, besides evaluating the specific influence of  sodium for cation absorption. The experiment were installed at greenhouse, in 8.5 kg plastic pots on benches, in which NaCl was applied  to promote 8, 16 and 24 dS/m electric conductivity  (at 25°C ) 150 mg P, 30 mg N. and 4 mg K peer  kg soil and, weekly, diluted solution of micronutrients. The soil was evaluated by the Sodium Adsorption Relation (SAR) and Exchangeable Sodium Relations (ESR), through samples from pots, at the end of the experiment.From the results, it was possible to conclude that occurred sodium  increase in the  soil solution and sodium absorption but  decrease  of potassium, calcium, magnesium and dry matter  in all cultivars. KEYWORDS: cotton, salinity, sodium.

Interference and Temperature Effects on Growth of Cotton (Gossypium hirsutum), Spurred Anoda (Anoda cristata), and Velvetleaf (Abutilon theophrasti)

Weed Science ◽  
1983 ◽  
Vol 31 (6) ◽  
pp. 892-898 ◽  
Author(s):  
Elizabeth P. Flint ◽  
David T. Patterson ◽  
Jan L. Beyers
Keyword(s):  
Gossypium Hirsutum ◽  
Leaf Area ◽  
Dry Matter ◽  
Dry Weight ◽  
Abutilon Theophrasti ◽  
Dry Matter Production ◽  
Replacement Series ◽  
Matter Production ◽  
Effects Of Temperature ◽  
Anoda Cristata

Effects of temperature and interference were examined in a replacement series experiment with cotton (Gossypium hirsutumL. 'Stoneville 213′), spurred anodaAnoda cristata(L.) Schlecht. # ANVCR), and velvetleaf (Abutilon theophrastiMedic. # ABUTH). Plants were grown in controlled-environment greenhouses at day/night temperatures of 32/23 or 26/17 C, and harvested 14 or 39 days after planting. Height, dry weight, and leaf area at both harvests, and dry matter production and leaf area duration for the harvest interval were significantly greater in all species at 32/23 C than at 26/17 C. Interference reduced the dry weight per plant and leaf area at day 39, and dry matter production for the harvest interval. Cotton was somewhat superior to both weeds as a competitor at 32/23 C, while spurred anoda was somewhat superior to cotton and velvetleaf at 26/17 C.

scholarly journals Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

2010 ◽  
Vol 39 (8) ◽  
pp. 1666-1675 ◽  
Author(s):  
Marcio Mahmoud Megda ◽  
Francisco Antonio Monteiro
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
System Development ◽  
Block Design ◽  
Dry Mass ◽  
Dry Matter Production ◽  
Root System Development ◽  
Randomized Block Design ◽  
Matter Production ◽  
Specific Length

The objective of this work was to study morphogenic characteristics, and dry matter production of roots and shoots of marandu palisadegrass (Brachiaria brizantha cv. Marandu) submitted to combinations of nitrogen and potassium, in a nutritive solution, employing silica as substrate. The experiment was carried out in a greenhouse during the summer. It was used a 5² fractionated factorial scheme with 13 combinations of nitrogen and potassium, which were distributed in a randomized block design, with four replications. The nitrogen × potassium interaction was significant for the number of tillers and leaves, for leaf area, for shoots and root section dry mass, for total length and surface and specific length and surface in the roots. Production of aerial part dry mass positively correlated with the number of tillers and leaves and grass leaf area. Nitrogen rates modulated the root system development, and the root specific length and surface decreased when high rates of nitrogen and potassium were supllied. Nitrogen and potassium influence Marandu palisadegrass morphogenic characteristics, which are determinant for grass dry matter production.

scholarly journals xpression of aquaporin subtypes (GhPIP1;1, GhTIP2;1, and GhSIP1;3) in cotton (Gossypium hirsutum L.) submitted to salt stress

AoB Plants ◽  
2019 ◽  
Author(s):  
Luana C C Braz ◽  
Pedro D Fernandes ◽  
Daniela D Barbosa ◽  
Wellison F Dutra ◽  
Carliane R C Silva ◽  
...  
Keyword(s):  
Salt Stress ◽  
Gas Exchange ◽  
Gossypium Hirsutum ◽  
Water Content ◽  
Relative Water Content ◽  
Dry Matter ◽  
Rna Extraction ◽  
Gossypium Hirsutum L ◽  
Relative Water ◽  
Agricultural Regions

Abstract Salinization leads to several worldwide damages in agricultural regions, mainly in semiarid regions where leaching of salt is poor due to limited and erratic rainfall. Cotton (Gossypium hirsutum L.) is a Malvaceae with wide genetic variability to salt stress. The identification of salinity tolerant genotypes is a dynamic target in a breeding program, and the selection is often based on plant phenotypes. Molecular markers are reliable tools to aid in these selection procedures. Aquaporin (AQPs) are channel proteins that play fundamental role in water relations and tolerance to environmental stresses. Plants have fine regulation of water transport through AQPs activities. In order to evaluate the AQP expressions of different cotton cultivars submitted to salt stress, we use molecular and physiological tools, based on RT-qPCR and gas exchange assays. Seven cultivars were submitted to 95 mM NaCl, started at V3 stage (21 days after emergence), during 72 h. At the end of stress treatment, root tissues were used to total RNA extraction, followed by cDNA synthesis and RT-qPCR analyzes. Three sets of specific primers were used, drawn from AQP accessions deposited in NCBI. Additionally, full expanded leaves were used to gas exchange assays and to estimate the relative water content. The dry matter of the shoots was also evaluated. Based on pattern of AQPs transcripts, we found that all semiarid tolerant cultivars (BRS Seridó, 7MH, CNPA MT 2009 152 and BRS 416) showed downregulation of AQP subtypes, mainly GhPIP1;1 and GhTIP2;1 whose action is characterized as tolerant to salinity. The results of gas exchanges, relative water content and dry matter were consistent with the molecular findings in these cultivars, confirming that GhPIP1;1 and GhTIP2;1, located at plasma membrane and vacuoles, respectively, could be adopted as AQP markers for identification of cotton tolerant to salt stress.

Depressed fodder quality and increased oestrogenic activity of lucerne infected with Pseudopeziza medicaginis

1980 ◽  
Vol 31 (6) ◽  
pp. 1103 ◽  
Author(s):  
WC Morgan ◽  
DG Parbery
Keyword(s):  
Protein Content ◽  
Leaf Area ◽  
Crude Protein ◽  
Dry Matter ◽  
Dry Matter Production ◽  
Crude Protein Content ◽  
Fodder Quality ◽  
Matter Production

As well as reducing dry matter production of lucerne, infection of 15 % of the leaf area by Pseucbpeziza medicaginis reduced digestibility by 14% and crude protein content by 16%. Infection caused oestrogenic activity in green lucerne.

Growth and yield studies of Lupinus angustifolius and L. albus in Victoria

1982 ◽  
Vol 22 (115) ◽  
pp. 76 ◽  
Author(s):  
KA Boundy ◽  
TG Reeves ◽  
HD Brooke
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Dry Matter ◽  
Yield Component ◽  
Early Flowering ◽  
Growth And Yield ◽  
Dry Matter Production ◽  
Sowing Time ◽  
Dry Matter Partitioning ◽  
Matter Production

The effect of serial planting on dry matter production, leaf area, grain yield and yield components cf Lupinus angustifoiius (cvv. Uniwhite, Uniharvest and Unicrop) and L. albus (cv. Ultra) was investigated in field plots at Rutherglen in 1973 and 1974. Delayed planting reduced dry matter production of all cultivars, and leaf area for Ultra. Differences in dry matter partitioning were observed between the late flowering Uniharvest, and the early flowering Unicrop and Ultra. In Uniharvest, delayed plantings resulted in a greater proportion of total dry matter being produced during the flowering phase, whereas the reverse was true for Unicrop and Ultra. The later flowering cultivars showed marked grain yield and yield component reduction with later sowing. Yields were reduced by 160.6 kg/ha and 222.5 kg/ha for each week's delay in sowing Uniharvest and Uniwhite, respectively. This effect was offset in the early flowering cultivars by greater development of lateral branches. In addition, when Unicrop and Ultra were planted in April, pod and flower abortion on the main stem resulted from low temperatures at flowering time. Optimum sowing time was early April for Uniwhite and Uniharvest, and early May for Unicrop and Ultra. Excellent vegetative growth under ideal moisture conditions highlighted the poor harvest indices of lupins and the scope for genetic improvement in the genus.

AN ANALYSIS OF DRY MATTER PRODUCTION OF DOUGLAS-FIR SEEDLINGS IN RELATION TO TEMPERATURE AND LIGHT INTENSITY

1967 ◽  
Vol 45 (11) ◽  
pp. 2063-2072 ◽  
Author(s):  
Holger Brix
Keyword(s):  
Light Intensity ◽  
Leaf Area ◽  
Dry Matter ◽  
Douglas Fir ◽  
Dry Matter Production ◽  
Dry Matter Distribution ◽  
Pronounced Increase ◽  
Light Intensities ◽  
Matter Production ◽  
Net Assimilation

Seedlings of Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) were grown in growth chambers under all combinations of three temperatures (13, 18, and 24 °C) and three light intensities (450, 1000, and 1800 ft-c). Dry matter production of leaves, stem, and roots was determined at 65 and 100 days after germination. The leaf area produced per unit of leaf dry weight and the dry matter distribution to the plant organs was measured. Net assimilation rates between the ages of 65 and 100 days were calculated. Rates of photosynthesis per unit of leaf were determined at different light intensities and temperatures, and rates of respiration of plant top and of roots were found for different temperatures.Increasing light intensity affected dry matter production in two opposing ways: (i) it increased the rate of photosynthesis per unit leaf area, and (ii) it decreased the leaf area added per unit of dry matter produced. A pronounced increase in growth with increase in temperature from 13 to 18 °C was a result of a temperature influence on production of leaf area rather than the effect of photosynthesis per unit of leaf. Net assimilation rates decreased with increase in temperature at all light intensities.

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