Assessment of rice (Oryza sativa L.) genotypes for drought stress tolerance using morpho-physiological indices as a screening technique

2020 ◽  
Vol 53 (1) ◽  
Author(s):  
Asma Asma ◽  
Iqbal Hussain ◽  
Muhammad Yasin Ashraf ◽  
Muhammad Arslan Ashraf ◽  
Rizwan Rasheed ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Oryza Sativa L ◽  
Screening Technique ◽  
Drought Stress Tolerance ◽  
Physiological Indices

scholarly journals In vitro Selection of Drought Stress Tolerance in Rice (Oryza sativa L.) var. Jarava

2019 ◽  
Vol 29 (1) ◽  
pp. 127-131 ◽  
Author(s):  
Omar H Obaid ◽  
SK Reddy
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Plant Tissue ◽  
In Vitro Selection ◽  
Oryza Sativa L ◽  
Drought Stress Tolerance ◽  
Selection Of

Abstract not available Plant Tissue Cult. & Biotech. 29(1): 127-131, 2019 (June)

Exogenous Glutathione-Mediated Drought Stress Tolerance in Rice (Oryza sativa L.) is Associated with Lower Oxidative Damage and Favorable Ionic Homeostasis

2020 ◽  
Vol 44 (4) ◽  
pp. 955-971 ◽  
Author(s):  
Abdullah Al Mamun Sohag ◽  
Md. Tahjib-Ul-Arif ◽  
Mohammed Arif Sadik Polash ◽  
Md. Belal Chowdhury ◽  
Sonya Afrin ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Oxidative Damage ◽  
Stress Tolerance ◽  
Oryza Sativa L ◽  
Ionic Homeostasis ◽  
Drought Stress Tolerance

Physiological and Biochemical Responses of Rice (Oryza Sativa L.) Varieties Against Drought Stress

2021 ◽  
Vol 50 (2) ◽  
pp. 335-342
Author(s):  
Ibrahim Selçuk Kuru ◽  
ÇIğdem Işikalan ◽  
Filiz Akbaş
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Oryza Sativa L ◽  
Drought Treatment ◽  
Local Varieties ◽  
Drought Stress Tolerance ◽  
Biochemical Responses ◽  
Physiological And Biochemical

Physiological and biochemical responses of six different rice (Oryza sativa L.) varieties cultivated in Turkey and two local varieties, namely Karacadağ and Hazro to the drought were investigated. After 12 days of drought treatment, the highest and lowest OP values were observed in Osmancık-97 (-1.14 MPa) and Karacadağ (-1.55 MPa) varieties, respectively. In the same treatment, it was observed that the amount of proline increased 19.9-fold in Karacadağ and 3.6-fold in Osmancık-97. When the data obtained from all parameters were correlated with drought stress tolerance, Osmancık-97 and Beşer varieties were considered to be tolerant, while Gönen and Karacadağ varieties are considered to be more sensitive. Bangladesh J. Bot. 50(2): 335-342, 2021 (June)

scholarly journals Rapid method of screening for drought stress tolerance in maize (Zea mays L.)

2020 ◽  
Vol 80 (01) ◽  
Author(s):  
Bhupender Kumar ◽  
Krishan Kumar ◽  
Shankar Lal Jat ◽  
Shraddha Srivastava ◽  
Tanu Tiwari ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Stress Tolerance ◽  
Low Cost ◽  
Large Set ◽  
Antioxidant Genes ◽  
Screening Technique ◽  
Drought Stress Tolerance ◽  
Hydroponic Solution ◽  
Drought Screening

Drought stress is the major production constraint in rainfed maize. Screening for drought tolerance is severely affected by the lack of a simple and reliable phenotyping technique. The objective of this study was to standardize a simple hydroponic based drought screening technique in maize. In this context, one week old uniform seedlings of 55 inbreds and 5 hybrids were transferred to hydroponic solution in the glass house. The seedlings were allowed to acclimatize for next one week in hydroponic solution. The drought stress was imposed by removing seedlings from nutrient solution and exposed to air for 6 and 4 hours daily for a period of 5 and 4 consecutive days in hybrids and inbreds, respectively. Data were recorded on all shoot and root parameters, and based on stress symptoms, a drought tolerance score was given to each genotype. The percent deductions in shoot and root fresh weight from non-stress to stress ranged from 11.7 to 84.4 and 2.1 to 77.5, respectively. Six inbred lines, namely, DQL790-4, CML334, CM140, CML422, CM125 and HKI488 and three hybrids namely DMRH1306, DMRH1410 and PMH4 were found drought tolerant. The effectiveness of this screening technique was compared and confirmed using pots screening as well as by expression profiling of key antioxidant genes (Sod2, Sod4, Sod9 and Apx1) playing role in drought stress tolerance. This phenotyping technique is very short, low cost and simple which can be utilized in preliminary drought screening for large set of maize germplasm and mapping populations.

scholarly journals Identifikasi Galur dan Gen-gen Terkait Toleran Kekeringan pada Padi Transgenik cv. T309 yang Mengandung Vektor Penanda Aktivasi

2016 ◽  
Vol 9 (3) ◽  
pp. 97
Author(s):  
Tri Joko Santoso ◽  
Aniversari Apriana ◽  
Atmitri Sisharmini ◽  
Kurniawan R. Trijatmiko
Keyword(s):  
Functional Analysis ◽  
Drought Stress ◽  
Stress Tolerance ◽  
Transgenic Rice ◽  
Oryza Sativa L ◽  
Activation Tagging ◽  
Pcr Analysis ◽  
Bar Gene ◽  
Efficient Tool ◽  
Drought Stress Tolerance

<p>Activation tagging is an efficient tool for<br />functional analysis of the rice genes. We have developed a<br />number of transgenic rice lines (Oryza sativa L. ssp.<br />japonica cv. Taipei 309) containing activation tagging vector.<br />However, the phenotypes and genotypes of these lines, in<br />relation to the drought stress, have not been analyzed. The<br />objectives of this research were to identify transgenic rice<br />lines that showed tolerance to the drought stress and to<br />identify the genes that may be associated with the drought<br />stress. The drought stress tolerance in transgenic rice lines<br />was identified by testing their tolerance to the drought stress<br />and also by detecting the presence of bar and nptII genes.<br />The result showed that 56 out of 59 rice lines were resistant<br />to Basta herbicide and three of them showed tolerance to<br />drought stress, namely PA.T-1.2, PA.T-4.1, and PA.T-5.1 lines.<br />PCR analysis showed that PA.T-1.2 and PA.T-4.1 contained<br />both hptII and bar genes, while the PA.T-5.1 line contained<br />bar gene only. Thermal Asymetric Interlaced-PCR (TAILPCR)<br />analysis showed that two genes may be asssociated<br />with the drought stress tolerance. Those genes are<br />OSJNBa0004120.14 that produces uridylate putative kinase<br />and OsPPCK2L that produces phosphoenolpyruvate<br />carboxylase kinase.</p>

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