scholarly journals Molecular and Physiological Responses to Abscisic Acid and Salts in Roots of Salt-Sensitive and Salt-Tolerant Indica Rice Varieties

1995 ◽  
Vol 107 (1) ◽  
pp. 177-186 ◽  
Author(s):  
A. Moons ◽  
G. Bauw ◽  
E. Prinsen ◽  
M. Van Montagu ◽  
D. Van Der Straeten
Keyword(s):  
Abscisic Acid ◽  
Indica Rice ◽  
Physiological Responses ◽  
Salt Tolerant ◽  
Rice Varieties

scholarly journals Identification and Validation a Major QTL from “Sea Rice 86” Seedlings Conferred Salt Tolerance

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 410 ◽  
Author(s):  
Fengling Wu ◽  
Jun Yang ◽  
Diqiu Yu ◽  
Peng Xu
Keyword(s):  
Salt Tolerance ◽  
Oryza Sativa L ◽  
Bulked Segregant Analysis ◽  
Indica Rice ◽  
Chromosome 1 ◽  
Saline Stress ◽  
Salt Tolerant ◽  
Rice Varieties ◽  
Target Region ◽  
High Salt Tolerance

Saline stress severely affects rice (Oryza sativa L.) growth and development and reduces crop yield. Therefore, developing salt-tolerant and high-yielding rice using quantitative trait loci (QTLs) and linkage markers is a priority for molecular breeding. Here, the indica rice Sea Rice 86 (SR86) seedlings showed higher tolerance than ordinary rice varieties in saline soil, and a dominant effect on salinity sensitivity was demonstrated by genetic analysis. We constructed bulked segregant analysis pools using F2 populations from parents Dianjingyou 1 as the recipient and SR86 as the donor. We identified a 2.78 Mb region on chromosome 1 as the candidate region. Using simple sequence repeat markers and substitution analysis, we mapped the target region within 5.49 cM in the vicinity of markers RM8904–RM493. We speculated that this QTL, named qST1.1, might contribute significantly to the salt tolerance of SR86. The high salt tolerance of introgression lines obtained by marker assistant selection (MAS) confirmed that the qST1.1 region was associated with salinity tolerance. This newly-discovered QTL will be helpful for the analysis of the salt-tolerant mechanism of rice and breeding high-quality rice varieties using MAS.

Biochemical and molecular characterisations of salt tolerance components in rice varieties tolerant and sensitive to NaCl: the relevance of Na+ exclusion in salt tolerance in the species

2021 ◽  
Vol 48 (1) ◽  
pp. 72
Author(s):  
Amber Gupta ◽  
Birendra P. Shaw
Keyword(s):  
Salt Tolerance ◽  
Indica Rice ◽  
Constitutive Expression ◽  
Initial Study ◽  
Cereal Crops ◽  
Salt Tolerant ◽  
Rice Varieties ◽  
Induced Expression ◽  
Soil Salinisation ◽  
Vacuolar Sequestration

Soil salinisation is a major abiotic stress in agriculture, and is especially a concern for rice production because among cereal crops, rice is the most salt-sensitive. However, the production of rice must be increased substantially by the year 2050 to meet the demand of the ever growing population. Hence, understanding the biochemical events determining salt tolerance in rice is highly desirable so that the trait can be introduced in cultivars of interest through biotechnological intervention. In this context, an initial study on NaCl response in four Indica rice varieties showed a lower uptake of Na+ in the salt-tolerant Nona Bokra and Pokkali than in the salt-sensitive IR64 and IR29, indicating Na+ exclusion as a primary requirement of salt tolerance in the species. This was also supported by the following features in the salt-tolerant, but not in the -sensitive varieties: (1) highly significant NaCl-induced increase in the activity of PM-H+ATPase, (2) a high constitutive level and NaCl-induced threonine phosphorylation of PM-H+ATPase, necessary to promote its activity, (3) a high constitutive expression of 14-3-3 protein that makes PM-H+ATPase active by binding with the phosphorylated threonine at the C-terminal end, (4) a high constitutive and NaCl-induced expression of SOS1 in roots, and (5) significant NaCl-induced expression of OsCIPK 24, a SOS2 that phosphorylates SOS1. The vacuolar sequestration of Na+ in seedlings was not reflected from the expression pattern of NHX1/NHX1 in response to NaCl. NaCl-induced downregulation of expression of HKTs in roots of Nona Bokra, but upregulation in Pokkali also indicates that their role in salt tolerance in rice could be cultivar specific. The study indicates that consideration of increasing exclusion of Na+ by enhancing the efficiency of SOS1/PM-H+ATPase Na+ exclusion module could be an important aspect in attempting to increase salt tolerance in the rice varieties or cultivars of interest.

scholarly journals Physiological Responses of Indica Rice Varieties to Increased Atmospheric CO2 and Temperature

2005 ◽  
Vol 60 (5) ◽  
pp. 601-604
Author(s):  
WMW WEERAKOON ◽  
WAJM de COSTA ◽  
DS de Z. ABEYSIRIWARDENA
Keyword(s):  
Indica Rice ◽  
Physiological Responses ◽  
Rice Varieties

Molecular and physiological responses of Iranian Perennial ryegrass as affected by Trinexapac ethyl, Paclobutrazol and Abscisic acid under drought stress

2017 ◽  
Vol 111 ◽  
pp. 129-143 ◽  
Author(s):  
Mohammad Hossein Sheikh Mohammadi ◽  
Nematollah Etemadi ◽  
Mohammad Mehdi Arab ◽  
Mostafa Aalifar ◽  
Mostafa Arab ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Perennial Ryegrass ◽  
Physiological Responses

scholarly journals Whole Genome Sequencing and Analysis of Godawee, a Salt Tolerant Indica Rice Variety

2017 ◽  
Vol 05 (01) ◽  
Author(s):  
Sanjeewa Singhabahu ◽  
Chathura Wijesinghe ◽  
Dilini Gunawardana ◽  
Muditha D Senarath Yapa ◽  
Madushani Kannangara ◽  
...  
Keyword(s):  
Whole Genome Sequencing ◽  
Genome Sequencing ◽  
Indica Rice ◽  
Rice Variety ◽  
Whole Genome ◽  
Salt Tolerant

scholarly journals Effects of hormonal priming on seed germination of pigeon pea under cadmium stress

2015 ◽  
Vol 87 (3) ◽  
pp. 1847-1852 ◽  
Author(s):  
LARISSA C. SNEIDERIS ◽  
MARINA A. GAVASSI ◽  
MARCELO L. CAMPOS ◽  
VICTOR D'AMICO-DAMIÃO ◽  
ROGÉRIO F. CARVALHO
Keyword(s):  
Abscisic Acid ◽  
Seed Germination ◽  
Efficient Method ◽  
Physiological Responses ◽  
Cadmium Stress ◽  
Pigeon Pea ◽  
Metal Stress ◽  
Hormonal Priming

In this work we investigated whether priming with auxin, cytokinin, gibberellin, abscisic acid and ethylene, alters the physiological responses of seeds of pigeon pea germinated under water and cadmium stress. Seeds treated with water or non-treated seeds were used as control. Although compared to non-treated seeds we found that the hormone treatments improve the germination of pigeon pea under cadmium stress, however, these treatments did not differ from water. However, we also observed a trend of tolerance to the effects of cadmium in the presence of ethylene, suggesting that the use of this hormone may be an efficient method to overcome seed germination under metal stress.

Sign in / Sign up

Export Citation Format

Share Document