Leaf physiological and anatomical characters contribute to drought tolerance of Nusa Tenggara Timur local rice cultivars

2020 ◽  
Author(s):  
Yustina Carolina Febrianti Salsinha ◽  
Maryani ◽  
Didik Indradewa ◽  
Yekti Asih Purwestri ◽  
Diah Rachmawati
Keyword(s):  
Drought Tolerance ◽  
Rice Cultivars ◽  
Anatomical Characters

Towards improving the drought tolerance of rice in China

2006 ◽  
Vol 4 (1) ◽  
pp. 47-53 ◽  
Author(s):  
Hongyan Liu ◽  
Hanwei Mei ◽  
Xinqiao Yu ◽  
Guihua Zou ◽  
Guolan Liu ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Recombinant Inbred Lines ◽  
Research Programme ◽  
Complex Trait ◽  
Central China ◽  
High Yield ◽  
Rice Cultivars ◽  
Evaluation Standard ◽  
Qtl Discovery ◽  
Trait Locus

Drought tolerance (DT) is a very complex trait. For the purpose of developing DT rice cultivars, a research programme was initiated in 1997 in China, consisting of four coherent parts: the development of a DT field screen facility and evaluation standard; the collection, evaluation and enhancement of DT rice resources; DT gene/quantitative trait locus (QTL) discovery; and DT rice breeding. More than 2000 rice accessions, mostly from China, were collected and evaluated in a new DT screening facility with a powerful water management system. Eighty-six entries were selected to serve as a core DT collection. A set of 187 recombinant inbred lines was developed for the genetic mapping of DT and high yield-related QTL under drought conditions. Several DT rice cultivars adapted to southern and central China were released. DT rice CMS lines were developed and distributed to most parts of China to encourage the development of DT or water-saving hybrid rice.

The effectivity of rice husk ash in enhancing drought tolerance on different rice cultivars

2018 ◽  
Author(s):  
Diah Rachmawati ◽  
Maryani ◽  
Ulfatul Masruroh ◽  
Ni Luh Gde Mona Monika
Keyword(s):  
Drought Tolerance ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Rice Cultivars

Physiological introspection into differential drought tolerance in rice cultivars of North East India

2019 ◽  
Vol 41 (4) ◽  
Author(s):  
Smita Sahoo ◽  
Bedabrata Saha ◽  
Jay Prakash Awasthi ◽  
Takhellambam Omisun ◽  
Pankaj Borgohain ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Rice Cultivars ◽  
North East India ◽  
North East

Effects of exogenous abscisic acid on foliar anthocyanin accumulation and drought tolerance in purple rice

Biologia ◽  
2015 ◽  
Vol 70 (7) ◽  
Author(s):  
Parinyaphorn Ploenlap ◽  
Wattana Pattanagul
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Reproductive Organs ◽  
Antioxidant Enzyme Activities ◽  
Rice Cultivars ◽  
Anthocyanin Accumulation ◽  
Exogenous Aba ◽  
Antioxidant Mechanism ◽  
Effects Of Drought ◽  
Dpph Scavenging

AbstractThe effects of drought and exogenous ABA on foliar anthocyanin accumulation and its role in drought tolerance were studied in two purple rice cultivars GS. No. 00621 and GS. No. 21427. The seedlings were grown for 14 days and separated into four groups including control (well-watered), drought (withholding water), ABA (foliar sprayed with 20 mg L−1 ABA and well-watered), ABA and drought (foliar sprayed with 20 mg L−1 ABA and withholding water). Drought was imposed by withholding water for 7 days. The results showed that drought significantly reduced root and shoot growth in GS. No. 00621, while had little effect on GS. No. 21427. Drought stress also induced anthocyanin overaccumulation in GS. No. 21427, whereas its content was reduced in GS. No. 00621. Exogenous ABA had no effect on anthocyanin in both wellwatered and drought conditions in both cultivars. Higher anthocyanin in GS. No. 21427 was coincided with higher DPPH scavenging ability, antioxidant enzyme activities as well as higher relative water content. It is, therefore, concluded that drought-induced anthocyanin overaccumulation may be different between purple rice cultivars and anthocyanin is beneficial for the response to drought stress by protecting plant antioxidant mechanism. Unlike anthocyanin in plant reproductive organs, exogenous ABA has no effect on foliar anthocyanin accumulation in purple rice. It is possible that anthocyanin accumulation in leaf and reproductive organs may be regulated differently or triggered by different mechanisms.

scholarly journals Acquired Traits Contribute More to Drought Tolerance in Wheat Than in Rice

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Preethi Vijayaraghavareddy ◽  
Ramu S. Vemanna ◽  
Xinyou Yin ◽  
Paul C. Struik ◽  
Udayakumar Makarla ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Drought Tolerance ◽  
Wheat Cultivar ◽  
Irrigation System ◽  
Moisture Stress ◽  
Crop Productivity ◽  
Carbon Gain ◽  
Total Biomass ◽  
Rice Cultivars ◽  
Ros Scavenging

Drought tolerance is governed by constitutive and acquired traits. Combining them has relevance for sustaining crop productivity under drought. Mild levels of stress induce specific mechanisms that protect metabolism when stress becomes severe. Here, we report a comparative assessment of “acquired drought tolerance (ADT)” traits in two rice cultivars, IR64 (drought susceptible) and Apo (tolerant), and a drought-tolerant wheat cultivar, Weebill. Young seedlings were exposed to progressive concentrations of methyl viologen (MV), a stress inducer, before transferring to a severe concentration. “Induced” seedlings showed higher tolerance and recovery growth than seedlings exposed directly to severe stress. A novel phenomic platform with an automated irrigation system was used for precisely imposing soil moisture stress to capture ADT traits during the vegetative stage. Gradual progression of drought was achieved through a software-controlled automated irrigation facility. This facility allowed the maintenance of the same level of soil moisture irrespective of differences in transpiration, and hence, this platform provided the most appropriate method to assess ADT traits. Total biomass decreased more in IR64 than in Apo. The wheat cultivar showed lower levels of damage and higher recovery growth even compared to Apo. Expression of ROS-scavenging enzymes and drought-responsive genes was significantly higher in Apo than in IR64, but differences were only marginal between Apo and Weebill. The wheat cultivar showed significantly higher stomatal conductance, carbon gain, and biomass than the rice cultivars, under drought. These differences in ADT traits between cultivars as well as between species can be utilised for improving drought tolerance in crop plants.

Genetic engineering of salt and drought tolerance in rice cultivars

2008 ◽  
pp. 582-583
Author(s):  
M. Jacobs ◽  
N. Roosens ◽  
D. T. Hien ◽  
B. Alemany ◽  
C. Montesinos ◽  
...  
Keyword(s):  
Genetic Engineering ◽  
Drought Tolerance ◽  
Rice Cultivars ◽  
Salt And Drought Tolerance

scholarly journals Yield and yield component performances of local pigmented upland rice cultivars from East Nusa Tenggara, Indonesia in three locations

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Antonius Ndiwa ◽  
Yosep S. Mau
Keyword(s):  
Drought Tolerance ◽  
Grain Yield ◽  
Upland Rice ◽  
Blast Resistance ◽  
Yield Component ◽  
Agronomic Performance ◽  
Rice Cultivars ◽  
Yield Performance ◽  
Rice Genotype

Abstract. Ndiwa ASS, Mau YS. 2019. Yield and yield component performances of local pigmented upland rice cultivars from East Nusa Tenggara, Indonesia in three locations. Trop Drylands 3: 49-55. Several pigmented upland rice cultivars from East Nusa Tenggara Province have been selected based on their agronomic performance, blast resistance, and drought tolerance traits. This study aimed to further elucidate the selected upland rice cultivars for their yield performance and stability in a multi-location trial in three locations. The results showed the significant effect of rice genotype, location, and interactions between rice genotype and location (GxE) on most observed variables, both in each location and across the three locations. Five genotypes produced average grain yield of ≥ 4.0 t/ha over three locations, i.e., NGR-22, PMK-01, ADN-05, Inpago 7 and Aek Sibundong. These five genotypes were found to produce high and stable grain yield under the three growing environments.

Proline accumulation and Δ1-pyrroline-5-carboxylate synthetase gene properties in three rice cultivars differing in salinity and drought tolerance

Plant Science ◽  
2003 ◽  
Vol 165 (5) ◽  
pp. 1059-1068 ◽  
Author(s):  
Do Thu Hien ◽  
Michel Jacobs ◽  
Geert Angenon ◽  
Christian Hermans ◽  
Tran Thanh Thu ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Proline Accumulation ◽  
Rice Cultivars

scholarly journals A new method for evaluating the drought tolerance of upland rice cultivars

2017 ◽  
Vol 5 (6) ◽  
pp. 488-498 ◽  
Author(s):  
Xiaofeng Zu ◽  
Yanke Lu ◽  
Qianqian Wang ◽  
Peifeng Chu ◽  
Wei Miao ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Upland Rice ◽  
New Method ◽  
Rice Cultivars

scholarly journals Physiological and oxidative defense responses of local rice cultivars “Nusa Tenggara Timur-Indonesia” during vegetative drought stress

2021 ◽  
pp. 394-400
Author(s):  
Yustina Carolina Febrianti Salsinha ◽  
Didik Indradewa ◽  
Yekti A. Purwestri ◽  
Diah Rachmawati
Keyword(s):  
Drought Tolerance ◽  
Defense Mechanism ◽  
Growth Parameters ◽  
Principal Component ◽  
Dry Weight ◽  
Defense Responses ◽  
Severe Drought ◽  
Abiotic Factor ◽  
Rice Cultivars ◽  
Oxidative Defense

Drought is the main abiotic factor that reduces productivity of crops such as rice in the suboptimum area. This study aimed to identify drought-tolerance of local rice cultivars “Nusa Tenggara Timur-Indonesia” through their oxidative defense mechanism. In this study, 17 local rice cultivars and two control cultivars (Ciherang and Situ Bagendit) were used. Drought was imposed by using three levels of FTSW: FTSW 1 (control), 0.5 (moderate drought), and 0.2 (severe drought) during the vegetative stage. Growth parameters such as plant height, number of tillers, number of leaves, and total dry weight were higher in Boawae 100 Malam, Hare Tora, and Padi Putih Kuatnana than other cultivars. The analysis of relative water content, chlorophyll, carotenoid, and proline content also indicated that the Boawae 100 Malam, Gogo Sikka, and Hare Tora cultivar showed a higher result compared to control and other cultivars. Thess characters tend to correlate with the higher activity of antioxidant enzymes in Boawae 100 Malam and Gogo Sikka, when exposed to severe drought conditions. Based on principal component analysis of the physiological changes and enzymatic antioxidant activity, the Gogo Sikka, Boawae 100 Malam, and Hare Tora cultivars were classified as rice cultivars with higher drought tolerance

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