Responses of seven diverse rice cultivars to water deficits II. Osmotic adjustment, leaf elasticity, leaf extension, leaf death, stomatal conductance and photosynthesis

Turner, Neil C.; O’Toole, J. C.; Cruz, R.T.; Yambao, E. B.; Ahmad, Sayeed; Namuco, O.S.; Dingkuhn, Michaël

doi:10.1016/0378-4290(86)90028-6

Cited by 78 publications

(19 citation statements)

References 15 publications

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“…Canopy temperature was measured with an infra-red thermometer and measurements were made within 2 hours of solar noon, and in a south-facing direction to minimize sun angle effects as suggested by Turner et al (1986).…”

Section: Methodsmentioning

confidence: 99%

Physiological Changes of Wheat Varieties Under Water Deficit Condition

Tasmina

Khan

Karim

et al. 2017

Bangladesh Agron. J.

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The experiment was carried out at the research field of the Department of Agronomy of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during November 2014 to March 2015 to assess and evaluate the physiological derivations of wheat varieties under water deficit condition. The experiment was laid out in a split plot design comprising two water regimes (irrigated or control and water stress) in main plot and three wheat varieties (BARI Gom 25, BARI Gom 26 and Sourav) in sub-plot with four replications. Surface irrigation was applied into the irrigated plots in total growing season but it was applied in water stress plots up to 21 days after sowing after that irrigation was stopped in water stress plots. It was revealed that studied parameters were significantly influenced by water regimes, variety and their interaction. The xylem exudation rate, light interception, SPAD value, leaf water potential, relative water content, water retention capacity was higher in irrigated condition where canopy temperature, water uptake capacity, water saturation deficit higher in water stress condition.The wheat var. BARI Gom 26 showed the highest PAR, SPAD value, leaf water potential, relative water content, water retention capacity where BARI Gom 25 exhibit lowest under water deficit condition. On the other hand, BARI Gom 25 showd the highest canopy temperature, water uptake capacity and water saturation deficit in water deficit condition. Therefore, considering the physiological performance and other characters BARI Gom 26 could be considered preferably for water shortage condition followed by Sourav where BARI Gom 25 was susceptible one.

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Section: Methodsmentioning

confidence: 99%

Physiological Changes of Wheat Varieties Under Water Deficit Condition

Tasmina

Khan

Karim

et al. 2017

Bangladesh Agron. J.

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“…Genetic variation for osmotic adjustment has been reported in wheat (Morgan, 1977(Morgan, , 1983Johnson et al, 1984;Morgan et a!., 1986), sorghum (Ackerson et a!., 1980;Shackel et al, 1982;Wright & Smith, 1983); millet (Henson, 1982;Henson et a!., 1982); rice (Turner et a!., 1986); cotton (Karami, et a!., 1980) and barley (Blum, 1989). However, little is known about the genetics of osmotic adjustment in tropical lowland maize.…”

Section: Introductionmentioning

confidence: 99%

Genetics of osmotic adjustment in breeding maize for drought tolerance

Guéi

Wassom

1993

Heredity

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Osmotic adjustment in higher plants refers to the maintenance of turgor by lowering of osmotic potential arising from the net accumulation of solutes in response to water deficits. Genetic variation for osmotic adjustment has been reported in several crops, but little is known about its inheritance and potential use as selection criteria in tropical maize (Zea mays L.). Two tropical lowland maize populations were used in this study to quantify the magnitude of genetic variability in osmotic adjustment; to estimate components of its genetic variance and heritability; and to determine the importance of this trait in breeding tropical maize for improved drought tolerance. Full-sibs within half-sib groups were developed using the Design I mating scheme and evaluated at two locations in Mexico for two seasons using water stress and non-stress environments. Results showed that in both populations, dominance genetic effects were more important than additive effects in controlling the expression of the trait. However, very little genetic variability was present in either population for the trait, although more genetic variation was detected with data collected at flowering stage, when water stress was more severe than at the vegetative stage. Non-significant phenotypic and genotypic correlations were found between osmotic adjustment and yield. Not much genetic gain could be expected from selection for osmotic adjustment in these populations.

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“…Nevertheless, the role of osmolytes are diverse and investigations on osmoprotectants have revealed that proline regulates cellular redox during stress (Kuznetsov & Shevyakova, 1999) while, manitol protects oxidation sensitive cellular structure by scavenging reactive oxygen species whereas, trehalose and fructan function as membrane stability (Nakayama et al, 2000), aquaporin, a major intrinsic protein super family facilitate control of water permeability through membrane (Luu & Maurel, 2005). A genetic variation of 0.3 -0.5 MPa has been reported for OA in rice (Turner et al, 1986). Though OA enable to maintain water absorption and cellular turgor pressure, a number of contrasting reports have been published.…”

Section: Osmoregulationmentioning

confidence: 99%

Water Deficit Condition Affecting Rice Production – Challenges and Prospects

Subramanian¹

2012

Crop Production Technologies

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Responses of seven diverse rice cultivars to water deficits II. Osmotic adjustment, leaf elasticity, leaf extension, leaf death, stomatal conductance and photosynthesis

Cited by 78 publications

References 15 publications

Physiological Changes of Wheat Varieties Under Water Deficit Condition

Physiological Changes of Wheat Varieties Under Water Deficit Condition

Genetics of osmotic adjustment in breeding maize for drought tolerance

Water Deficit Condition Affecting Rice Production – Challenges and Prospects

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