Changes in plant morphology and dry matter partitioning caused by potassium deficiency in Gossypium hirsutum (L.)

2010 ◽  
Vol 67 (3) ◽  
pp. 451-459 ◽  
Author(s):  
Edward Gerardeaux ◽  
Lionel Jordan-Meille ◽  
Julie Constantin ◽  
Sylvain Pellerin ◽  
Michael Dingkuhn
Keyword(s):  
Gossypium Hirsutum ◽  
Dry Matter ◽  
Plant Morphology ◽  
Potassium Deficiency ◽  
Gossypium Hirsutum L ◽  
Dry Matter Partitioning

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.

Impact of short-term exposure to cold night temperatures on early development of cotton (Gossypium hirsutum L.)

2004 ◽  
Vol 55 (6) ◽  
pp. 655 ◽  
Author(s):  
M. P. Bange ◽  
S. P. Milroy
Keyword(s):  
Gossypium Hirsutum ◽  
Cold Shock ◽  
Production Systems ◽  
Management Strategies ◽  
Plant Morphology ◽  
Dry Weight ◽  
Cotton Production ◽  
Gossypium Hirsutum L ◽  
Cold Night ◽  
Short Term Exposure

Regression analysis of field data has indicated that minimum daily temperatures below 11°C delay the development of cotton (Gossypium hirsutum L.) seedlings beyond what would be expected based on the accumulated degree-day sum. In Australian cotton production systems, events where the minimum daily temperature falls below this value are referred to as ‘cold shocks’. The number of cold shocks is used by growers and advisors in assessing retardation of crops in their areas. However, this effect has not been tested explicitly. The aim of this work was to empirically assess effects of cold shock on pre-flower development of cotton plants. Cotton seedlings were grown in controlled-temperature glasshouses. Plants were transferred to cold chambers ranging from 5 to 22°C during the night period for durations from 3 to 10 days. Negative effects were not seen until plants had been exposed to at least 10 nights at 10°C, or for at least 5 nights at 5°C. When differences were generated it did not delay development to first square any more than 4 days, nor was the effect consistent. These differences translated into delays to first flower, but had little effect on plant morphology, or on dry weight measured soon after flowering. In one experiment, a significant reduction in leaf photosynthesis was measured at two times of day on the day after cold shock at 5°C. Improving understanding of the effects of temperature extremes on cotton growth and development will help in developing more functional decision-support tools and field management strategies.

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.

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.

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