Effects of Water Deficit on Proline Accumulation and Growth of two Cotton Genotypes of Different Drought Resistances

The kinetics of protein incorporation from newly-absorbed nitrogen (N, de novo protein synthesis) was estimated by 15N tracing in 18-week-old white clover plants (Trifolium repens L. cv. Regal) during 7 d of water-deficit treatment. The physiological relationship between kinetics and accumulation of proline and ammonia in response to the change in leaf-water parameters was also assessed. All leaf-water parameters measured decreased gradually under water deficit. Leaf and root dry mass was not significantly affected during the first 3 d when decreases in leaf-water parameters were substantial. However, metabolic parameters such as total N, proline and ammonia were significantly affected within 1 d of commencement of water-deficit treatment. Water-deficit treatment significantly increased the proline and NH3–NH4+ concentrations in both leaves and roots. There was a marked reduction in the amount of N incorporated into the protein fraction from the newly absorbed N (NANP) in water-deficit stressed plants, particularly in leaf tissue. This reduction in NANP was strongly associated with an increased concentration of NH3–NH4+ in roots (P≤0.05) and proline (P≤0.01) in leaves and roots. These results suggest that proline accumulation may be a sensitive biochemical indicator of plant water status and of the dynamics of de novo protein synthesis in response to stress severity.

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Stability analysis of different cotton genotypes under normal and water-deficit conditions

Journal of Integrative Agriculture ◽

10.1016/s2095-3119(18)62041-6 ◽

2019 ◽

Vol 18 (6) ◽

pp. 1257-1265 ◽

Cited By ~ 2

Author(s):

Muhammad Riaz ◽

Jehanzeb Farooq ◽

Saghir Ahmed ◽

Muhammad Amin ◽

Waqas Shafqat Chattha ◽

...

Keyword(s):

Stability Analysis ◽

Water Deficit ◽

Cotton Genotypes

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Effects of exogenous nitric oxide on growth, proline accumulation and antioxidant capacity in Cakile maritima seedlings subjected to water deficit stress

Functional Plant Biology ◽

10.1071/fp15363 ◽

2016 ◽

Vol 43 (10) ◽

pp. 939 ◽

Cited By ~ 8

Author(s):

Asma Jday ◽

Kilani Ben Rejeb ◽

Ines Slama ◽

Kaouthar Saadallah ◽

Marianne Bordenave ◽

...

Keyword(s):

Nitric Oxide ◽

Water Deficit ◽

Stress Responses ◽

Lipid Membrane ◽

Proline Accumulation ◽

Shoot Biomass ◽

Water Deficit Stress ◽

Leaf Water Content ◽

Protein Levels ◽

Cakile Maritima

Nitric oxide (NO) – an endogenous signalling molecule in plants and animals – mediates responses to biotic and abiotic stresses. In the present study, we examined the role of exogenous application of NO in mediating stress responses in Cakile maritima Scop. seedlings under water deficit stress using sodium nitroprusside (SNP) as NO donor and as a pre-treatment before the application of stress. Water deficit stress was applied by withholding water for 14 days. Growth, leaf water content (LWC), osmotic potential (ψs), chlorophyll, malondialdehyde (MDA), electrolyte leakage (EL), proline and Δ1-pyrroline-5-carboxylate synthetase (P5CS) and proline dehydrogenase (ProDH) protein levels were determined. Enzyme activities involved in antioxidant activities (superoxide dismutase (SOD) and catalase (CAT)) were measured upon withholding water. The results showed that shoot biomass production was significantly decreased in plants subjected to water deficit stress alone. However, in water deficit stressed plants pre-treated with SNP, growth activity was improved and proline accumulation was significantly increased. Proline accumulation was concomitant with the stimulation of its biosynthesis as shown by the accumulation of P5CS proteins. Nevertheless, no significant change in ProDH protein levels was observed. Besides plants showed lower water deficit-induced lipid membrane degradation and oxidative stress after the pretreatment with 100 µM SNP. This behaviour was related to the increased activity of SOD and CAT. Thus, we concluded that NO increased C. maritima drought tolerance and mitigated damage associated with water deficit stress by the regulation of proline metabolism and the reduction of oxidative damage.

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Genetic divergence among Egyptian cotton genotypes under water deficit conditions

Acta Ecologica Sinica ◽

10.1016/j.chnaes.2020.11.007 ◽

2020 ◽

Author(s):

M.A. Abdel-Monaem ◽

W.A.E. Abido ◽

Ágnes Hadházy ◽

M.H. Ghoneima ◽

Y.M. EL-Mansy ◽

...

Keyword(s):

Water Deficit ◽

Genetic Divergence ◽

Cotton Genotypes ◽

Egyptian Cotton

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Arbuscular mycorrhiza improved growth performance in Macadamia tetraphylla L. grown under water deficit stress involves soluble sugar and proline accumulation

Plant Growth Regulation ◽

10.1007/s10725-012-9771-6 ◽

2012 ◽

Vol 69 (3) ◽

pp. 285-293 ◽

Cited By ~ 56

Author(s):

Suravoot Yooyongwech ◽

Nuttawuth Phaukinsang ◽

Suriyan Cha-um ◽

Kanyaratt Supaibulwatana

Keyword(s):

Growth Performance ◽

Arbuscular Mycorrhiza ◽

Water Deficit ◽

Soluble Sugar ◽

Proline Accumulation ◽

Water Deficit Stress

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ESTRATÉGIAS DE MANEJO DO DÉFICIT HÍDRICO EM FASES FENOLÓGICAS DO ALGODOEIRO COLORIDO

Irriga ◽

10.15809/irriga.2020v25n4p656-662 ◽

2020 ◽

Vol 25 (4) ◽

pp. 656-662

Author(s):

Lauriane Almeida dos Anjos Soares ◽

KAROLINE MARIA MENDES DIAS ◽

HEMILE MACHADO NASCIMENTO ◽

GEOVANI SOARES DE LIMA ◽

KELDER JOSÉ ALVES DE OLIVEIRA ◽

...

Keyword(s):

Gossypium Hirsutum ◽

Water Deficit ◽

Irrigated Agriculture ◽

Limiting Factor ◽

Gossypium Hirsutum L ◽

Root Shoot Ratio ◽

Colored Cotton ◽

Cotton Genotypes ◽

E Mail ◽

Phenological Phases

ESTRATÉGIAS DE MANEJO DO DÉFICIT HÍDRICO EM FASES FENOLÓGICAS DO ALGODOEIRO COLORIDO LAURIANE ALMEIDA DOS ANJOS SOARES1; KAROLINE MARIA MENDES DIAS2; HEMILE MACHADO NASCIMENTO3; GEOVANI SOARES DE LIMA4; KELDER JOSÉ ALVES DE OLIVEIRA5 E SAULO SOARES DA SILVA6 1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 2 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected]. 3 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 4 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected] 5 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 6 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected] 1 RESUMO A escassez hídrica é um fator limitante para a agricultura irrigada, principalmente em algumas fases do algodoeiro, afetando os processos fisiológicos e consequentemente a produtividade. Neste contexto, objetivou-se com este trabalho avaliar a fitomassa e os componentes de produção de genótipos de algodoeiro colorido sob déficit hídrico nas diferentes fases de fenológicas da planta. As plantas foram conduzidas em lisímetros sob condições de campo, no Centro de Ciências e Tecnologia Agroalimentar pertencente à Universidade Federal de Campina Grande, na cidade de Pombal-PB. O delineamento utilizado foi em blocos ao acaso em esquema fatorial 3 x 3, sendo três genótipos de algodão de fibra colorida (BRS Rubi, BRS Topázio e BRS Safira) irrigados sob déficit hídrico durante as três fases de desenvolvimento da cultura (vegetativa, floração e frutificação). A relação raiz/parte aérea é mais sensível aos efeitos do déficit hídrico na fase de floração e formação dos capulhos. Dentre os genótipos o BRS Topázio é o mais tolerante ao déficit hídrico (40% da ETr) durante a fase vegetativa para o número de sementes totais. O déficit hídrico na fase de frutificação do algodoeiro colorido pode ser utilizado no cultivo do algodoeiro com as menores perdas no peso de 100 sementes. Palavras-chave: Gossypium hirsutum L., fitomassa, produção SOARES, L. A. dos A.; DIAS, K. M. M.; NASCIMENTO, H. M.; LIMA, G. S. de OLIVEIRA, K. J. A. de; SILVA, S. S. da STRATEGIES FOR THE MANAGEMENT OF WATER DEFICIT IN PHENOLOGICAL PHASES OF COLORED COTTON 2 ABSTRACT Water scarcity is a limiting factor for irrigated agriculture, mainly in some phases of cotton, affecting physiological processes and consequently productivity. In this context, this work aimed to evaluate the phytomass and production components of colored cotton genotypes under water deficit in different phenological phases of the plant. The plants were conducted in lysimeters under field conditions, at the Center for Science and Agrifood Technology belonging to the Federal University of Campina Grande, in the city of Pombal-PB. The design used was in a randomized block in a 3 x 3 factorial scheme, with three colored fiber cotton genotypes (BRS Rubi, BRS Topázio and BRS Safira) irrigated under water deficit during the three stages of crop development (vegetative, flowering and fruiting). The root/shoot ratio is more sensitive to the effects of water deficit during flowering and boll formation. Among the genotypes, BRS Topázio is the most tolerant to water deficit (40% of ETr) during the vegetative phase for the number of total seeds. The water deficit in the fruiting stage of colored cotton can be used in the cultivation of cotton with the lowest losses in the weight of 100 seeds. Keywords: Gossypium hirsutum L., phytomass, production