Use of drought response index for identification of drought tolerant genotypes in rainfed lowland rice

2006 ◽  
Vol 99 (1) ◽  
pp. 48-58 ◽  
Author(s):  
Makara Ouk ◽  
J. Basnayake ◽  
M. Tsubo ◽  
S. Fukai ◽  
K.S. Fischer ◽  
...  
Keyword(s):  
Lowland Rice ◽  
Drought Response ◽  
Response Index ◽  
Drought Tolerant ◽  
Rainfed Lowland

scholarly journals EMS Derived Wheat Mutant BIG8-1 (Triticum aestivum L.)—A New Drought Tolerant Mutant Wheat Line

2021 ◽  
Vol 22 (10) ◽  
pp. 5314
Author(s):  
Marlon-Schylor L. le Roux ◽  
Nicolas Francois V. Burger ◽  
Maré Vlok ◽  
Karl J. Kunert ◽  
Christopher A. Cullis ◽  
...  
Keyword(s):  
Amino Acids ◽  
Water Deficit ◽  
Triticum Aestivum L ◽  
Water Deficit Stress ◽  
Drought Response ◽  
Fibrous Root ◽  
Wheat Varieties ◽  
Breeding Programs ◽  
Response Characteristics ◽  
Drought Tolerant

Drought response in wheat is considered a highly complex process, since it is a multigenic trait; nevertheless, breeding programs are continuously searching for new wheat varieties with characteristics for drought tolerance. In a previous study, we demonstrated the effectiveness of a mutant known as RYNO3936 that could survive 14 days without water. In this study, we reveal another mutant known as BIG8-1 that can endure severe water deficit stress (21 days without water) with superior drought response characteristics. Phenotypically, the mutant plants had broader leaves, including a densely packed fibrous root architecture that was not visible in the WT parent plants. During mild (day 7) drought stress, the mutant could maintain its relative water content, chlorophyll content, maximum quantum yield of PSII (Fv/Fm) and stomatal conductance, with no phenotypic symptoms such as wilting or senescence despite a decrease in soil moisture content. It was only during moderate (day 14) and severe (day 21) water deficit stress that a decline in those variables was evident. Furthermore, the mutant plants also displayed a unique preservation of metabolic activity, which was confirmed by assessing the accumulation of free amino acids and increase of antioxidative enzymes (peroxidases and glutathione S-transferase). Proteome reshuffling was also observed, allowing slow degradation of essential proteins such as RuBisCO during water deficit stress. The LC-MS/MS data revealed a high abundance of proteins involved in energy and photosynthesis under well-watered conditions, particularly Serpin-Z2A and Z2B, SGT1 and Calnexin-like protein. However, after 21 days of water stress, the mutants expressed ABC transporter permeases and xylanase inhibitor protein, which are involved in the transport of amino acids and protecting cells, respectively. This study characterizes a new mutant BIG8-1 with drought-tolerant characteristics suited for breeding programs.

scholarly journals Genotypic Variation in Response of Rainfed Lowland Rice to Prolonged Drought and Rewatering

2004 ◽  
Vol 7 (4) ◽  
pp. 406-420 ◽  
Author(s):  
Akihiko Kamoshita ◽  
Reynaldo Rodriguez ◽  
Akira Yamauchi ◽  
Len Wade
Keyword(s):  
Genotypic Variation ◽  
Lowland Rice ◽  
Rainfed Lowland ◽  
Prolonged Drought

scholarly journals Satellite-based Hybrid Drought Assessment using Vegetation Drought Response Index in South Korea (VegDRI-SKorea)

2015 ◽  
Vol 57 (4) ◽  
pp. 1-9 ◽  
Author(s):  
Won-Ho Nam ◽  
Tsegaye Tadesse ◽  
Brian D. Wardlow ◽  
Min-Won Jang ◽  
Suk-Young Hong
Keyword(s):  
South Korea ◽  
Drought Response ◽  
Drought Assessment ◽  
Response Index

scholarly journals Performance of Rainfed Lowland Rice Genotypes under Different Levels of Boron Application

2017 ◽  
Vol 13 (1) ◽  
pp. 28-34
Author(s):  
Ram Kumar Shrestha ◽  
Sita Paudel ◽  
Samjhana Wagle ◽  
Salikram Ghimire ◽  
Deepak Yadav
Keyword(s):  
Lowland Rice ◽  
Rainfed Lowland ◽  
Rice Genotypes ◽  
Different Levels

scholarly journals Stomatal Responses in Rainfed Lowland Rice to Partial Soil Drying; Comparison of Two Lines

2009 ◽  
Vol 12 (1) ◽  
pp. 17-28 ◽  
Author(s):  
Joel DLC. Siopongco ◽  
Kazumi Sekiya ◽  
Akira Yamauchi ◽  
James Egdane ◽  
Abdelbagi Ismail ◽  
...  
Keyword(s):  
Lowland Rice ◽  
Soil Drying ◽  
Stomatal Responses ◽  
Rainfed Lowland

The Vegetation Drought Response Index (VegDRI): A New Integrated Approach for Monitoring Drought Stress in Vegetation

2008 ◽  
Vol 45 (1) ◽  
pp. 16-46 ◽  
Author(s):  
Jesslyn F. Brown ◽  
Brian D. Wardlow ◽  
Tsegaye Tadesse ◽  
Michael J. Hayes ◽  
Bradley C. Reed
Keyword(s):  
Drought Stress ◽  
Integrated Approach ◽  
Drought Response ◽  
Response Index

scholarly journals Drought tolerant rice breeding lines developed for rainfed lowland areas

2020 ◽  
Vol 423 ◽  
pp. 012019
Author(s):  
A Hairmansis ◽  
Yullianida ◽  
R Hermanasari ◽  
A P Lestari ◽  
P Sasmita ◽  
...  
Keyword(s):  
Rice Breeding ◽  
Breeding Lines ◽  
Drought Tolerant ◽  
Rainfed Lowland
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