Supplementation of potassium alleviates water stress‐induced changes in Sorghum bicolor L.

2020 ◽  
Author(s):  
Megha Tittal ◽  
Rayees Ahmad Mir ◽  
Keshav Singh Jatav ◽  
Rajiv Mohan Agarwal
Keyword(s):  
Water Stress ◽  
Sorghum Bicolor ◽  
Induced Changes ◽  
Sorghum Bicolor L

scholarly journals EFEITOS DO DÉFICIT HÍDRICO EM PARÂMETROS FISIOLÓGICOS DE FOLHAS DE SORGO (Sorghum bicolor, L.)

Irriga ◽  
1998 ◽  
Vol 3 (3) ◽  
pp. 81-88
Author(s):  
Carlos Augusto Lima Porto ◽  
Antonio Evaldo Klar ◽  
José Vicente Vasconcelos
Keyword(s):  
Water Stress ◽  
Sorghum Bicolor ◽  
Water Potential ◽  
Water Content ◽  
Relative Water Content ◽  
Water Status ◽  
Soil Water Potential ◽  
Relative Water ◽  
Conductivity Water ◽  
Sorghum Bicolor L

EFEITOS DO DÉFICIT HÍDRICO EM PARÂMETROS FISIOLÓGICOS DE FOLHAS DE SORGO (Sorghum bicolor, L.)  Carlos Augusto Lima PortoAntonio Evaldo Klar(2)José Vicente VasconcelosDepartamento de Engenharia Rural – Faculdade de Ciências Agronômicas – UNESPFone: (014) 821-3883  Fax: (014) 821-343818603-97’ – Botucatu - SP  1 RESUMO O experimento foi conduzido em casa de vegetação no Departamento de Engenharia Rural da Faculdade de Ciências Agronômicas - UNESP/Botucatu, SP, com delineamento experimental inteiramente casualizado, com 12 repetições. A cultura do sorgo (Sorghum bicolor, L.) foi plantada em vasos que continham 8,0 kg de solo (base em peso de solo seco), pertencente ao grande grupo Terra Roxa Estruturada para os dois tratamentos: a) plantas submetidas a défices  hídricos, sendo irrigadas quando o potencial de água no solo chegava a -1,5 MPa, elevando-o às imediações de -0,01 MPa), e b) plantas irrigadas constantemente por capilaridade. Todas as plantas foram irrigadas aos 55 dias após a emergência e os parâmetros avaliados foram: condutância estomática, potencial de água e teor relativo de água nas folhas mais novas totalmente expandidas, com determinações diárias entre as onze e treze horas, até que o potencial de água no solo atingisse valores em torno de -1,5 MPa. Da análise geral dos dados obtidos, pode-se inferir que a variação no status de água na folha observado através do potencial e do teor relativo de água nas folhas pode ser utilizado para indicar o momento de irrigar; ainda estas medições podem ser indicativas das plantas ou cultivares de sorgo que se mostram mais tolerantes à seca e que o mecanismo de adaptação é o  “avoidance”. UNITERMOS: Condutividade estomática, potencial de água na folha, teor relativo de água na folha,  tolerância à seca.  PORTO, C. A . L.., KLAR, A. E. , VASCONCELLOS, V. J.  Water deficit on physiological parameters of soybean  leaves (Sorghum bicolor L).  2 ABSTRACT A study was carried out at Agricultural Engineering Department, UNESP, Botucatu - SP, with a sorghum crop (Sorghum bicolor, L.) in order to physiologically evaluate the crop response to drought. A completely random design with twelve replications were used. Pots with 8 kg of a medium texture soil (dry weight basis) were used in order to test the influence of the two treatments: a) plants being submitted to a water stress, where irrigation were done when the water potential in the soil (s) were -1,5 MPa, raising it to about -0,01 MPa, and b) plants being always irrigated by capillary. The parameters evaluated were water vapor stomata conductivity, water potential  and relative water content in the leaves.  All plants were irrigated at 55 days after emergency, with daily determinations from eleven AM to thirteen PM, until soil water potential reaches around -1,5MPa. From the general data analysis, it can be inferred that there was a significant variation in the water status in the leaves by determinations of water potential and relative water content in the leaves, indicating that the method may be used to indicate the moment of irrigation and the plants and cultivars more tolerant to drought.  Sorghum plants showed adaptation to water stress under avoidance mechanism. KEYWORDS: Stomata conductivity, water potential in the leaves, relative water content, drought tolerance.

scholarly journals Application of multivariate analysis to evaluate the biochemical changes in sorghum (Sorghum bicolor L. Moench) after exposure to water stress and silicon applications

2015 ◽  
Vol 14 (49) ◽  
pp. 3257-3263 ◽  
Author(s):  
Castro de Souza Luma ◽  
André dos Santos Nogueira Glauco ◽  
Ferraz de Almeida Risely ◽  
Castro de Souza Leane ◽  
Galvão Myriam ◽  
...  
Keyword(s):  
Multivariate Analysis ◽  
Water Stress ◽  
Sorghum Bicolor ◽  
Biochemical Changes ◽  
Sorghum Bicolor L

Contribution of osmotic adjustment to grain yield in Sorghum bicolor (L.) Moench under water-limited conditions. II. Water stress after anthesis

1990 ◽  
Vol 41 (1) ◽  
pp. 67 ◽  
Author(s):  
MM Ludlow ◽  
JM Santamaria ◽  
S Fukai
Keyword(s):  
Water Stress ◽  
Grain Yield ◽  
Sorghum Bicolor ◽  
Osmotic Adjustment ◽  
Water Shortage ◽  
Mean Values ◽  
Distribution Index ◽  
Late Maturity ◽  
The Difference ◽  
Sorghum Bicolor L

The contribution of osmotic adjustment to grain yield in Sorghum bicolor (L.) subjected to water stress between anthesis and maturity was studied using six entries. Three of the entries (Goldrush, E57, and DK470) were selected for high osmotic adjustment and the other three (Texas 610SR, Texas 671, and SC 219-9-19-1) for low osmotic adjustment, and divided into early, intermediate and late maturity groups. Entries were either well watered, or subjected to a 50-day period of water shortage after anthesis following being well-watered prior to anthesis. Entries selected for high osmotic adjustment had mean values of osmotic adjustment at the end of the post-anthesis stress more than double those selected for low osmotic adjustment. The corresponding mean grain yield of entries with high osmotic adjustment were 24% higher than that of entries with low osmotic adjustment. The higher yield was due to both more and larger grains, and it was associated with higher harvest index and distribution index. At best, the difference in dry matter at maturity could explain only a few per cent of the difference in grain yield between entries with low and high osmotic adjustment. Water stress prior to anthesis (previous paper) reduced yield more than a post-anthesis stress of the same intensity. However, osmotic adjustment was equally effective in minimizing the reduction in grain yields in both stages. The use of osmotic adjustment as a selection trait in programs to improve the yield of grain sorghum is briefly discussed.

Nutritional composition of sorghum [sorghum bicolor (L.) Moench] genotypes cultivated without and with water stress

2015 ◽  
Vol 65 ◽  
pp. 103-111 ◽  
Author(s):  
Valéria A. Vieira Queiroz ◽  
Camila Santana da Silva ◽  
Cícero Bezerra de Menezes ◽  
Robert Eugene Schaffert ◽  
Flávia F. Mendes Guimarães ◽  
...  
Keyword(s):  
Water Stress ◽  
Sorghum Bicolor ◽  
Nutritional Composition ◽  
Sorghum Bicolor L
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