Changes in Certain Antioxidative Enzymes and Growth Parameters as a Result of Complete Submergence and Subsequent Re-aeration of Rice Cultivars Differing in Submergence Tolerance

2001 ◽  
Vol 187 (2) ◽  
pp. 69-74 ◽  
Author(s):  
R. K. Sarkar ◽  
S. Das ◽  
I. Ravi
Keyword(s):  
Antioxidative Enzymes ◽  
Growth Parameters ◽  
Submergence Tolerance ◽  
Rice Cultivars

scholarly journals Effect of irrigation salinity on the growth and yield of two Aus rice cultivars of Bangladesh

2018 ◽  
Vol 7 (2) ◽  
pp. 1-12 ◽  
Author(s):  
Tahmina Khanam ◽  
Nahid Akhtar ◽  
MA Halim ◽  
Feroza Hossain
Keyword(s):  
Salt Stress ◽  
Growth Parameters ◽  
Tiller Number ◽  
Growth And Yield ◽  
Yield Response ◽  
Rice Cultivars ◽  
Growth Reduction ◽  
Water Control ◽  
Yield Parameters ◽  
Pot Culture

The experiment was conducted to clarify the growth and yield response of two rice cultivars, BR55 and BR43 under salt stress. Six different concentrations of NaCl viz 50, 100, 150, 200, 250 and 300 mM and distilled water (control) were applied on the rice cultivars which were grown under pot culture condition. Growth parameters like plant height, tiller number, leaf number and leaf area were negatively affected by salinity in both cultivars. Salt stress caused a significant reduction in yield in both cultivars of rice. Growth reduction was higher in BR43 than in BR55.The reduction in yield and yield parameters were found to be lower in BR55 than those in BR43. The results obtained in the present study suggest that BR55 showed higher salt tolerance than in BR43. Jahangirnagar University J. Biol. Sci. 7(2): 1-12, 2018 (December)

Influence and interaction of iron and cadmium on photosynthesis and antioxidative enzymes in two rice cultivars

Chemosphere ◽  
2017 ◽  
Vol 171 ◽  
pp. 240-247 ◽  
Author(s):  
Houjun Liu ◽  
Chengxin Zhang ◽  
Junmei Wang ◽  
Chongjun Zhou ◽  
Huan Feng ◽  
...  
Keyword(s):  
Antioxidative Enzymes ◽  
Rice Cultivars

Evaluation of Submergence Tolerance in Landrace Rice Cultivars by Various Growth and Yield Parameters

2019 ◽  
Vol 22 (4) ◽  
pp. 335-344
Author(s):  
Md. Hasanul Abedin ◽  
Md. Abdullah Al Mamun ◽  
Md. Abdul Baset Mia ◽  
Md. Abdul Karim
Keyword(s):  
Growth And Yield ◽  
Submergence Tolerance ◽  
Rice Cultivars ◽  
Yield Parameters

scholarly journals Growth and Yield of Kalimantan Landrace Rice and “IPB 8G” as Affected by Dose and Time of Application of Nitrogen Fertilizer

2019 ◽  
Vol 6 (02) ◽  
pp. 129-137
Author(s):  
Faisal Faisal ◽  
Iskandar Lubis ◽  
Ahmad Junaedi ◽  
Sugiyanta Sugiyanta
Keyword(s):  
Nitrogen Fertilizer ◽  
Harvest Index ◽  
Growth Parameters ◽  
Rice Cultivar ◽  
N Fertilizer ◽  
Growth And Yield ◽  
Rice Cultivars ◽  
Vegetative Phase ◽  
Panicle Number ◽  
N Dose

The study aimed to determine the effect of nitrogen fertilizer dose and the frequency of application on the growth and production of landrace rice Kalimantan and a new rice cultivar "IPB 8G". The study was conducted in December 2017 until June 2018 at the Sawah Baru Experimental Field, Bogor Agricultural University, West Java, Indonesia. The experimental design was a split-split plot consisting of three treatment factors, i.e. rice cultivars (main plots), fertilization time (sub-plots) and fertilizing doses (sub-plots). The three rice cultivars used in this trial were local cultivars "Mayas" and "Samarinda", and a newly developed rice cultivar "IPB 8G".  The application rates of Nitrogen were 0, 75, and 150 kg N.ha-1 applied at different phases of rice growth: 50% N dose was applied at planting, 25% N dose at the vegetative phase, and 25% at the primordial phase.  The different rates of N fertilizer were applied four times, 40% at planting, 20% during the vegetative phase, 20% at the primordial phase, and 20% at heading. Each treatment consisted of three replications totalling 54 experimental units. The N fertilizer application gave a significant effect on all growth parameters except for the harvest index. Time of fertilization significantly affected rice panicle number per hill and harvest index. There were significant differences in the growth of the three rice cultivars, except for the number of tillers. Rice crops fertilized three times with a dose of 75 kg N.ha-1 had the highest number of tillers at 5 week after planting, but it was not significantly different from N at 150 kg.ha-1. The highest grain yield of 2.9 t.ha-1 was obtained from "IPB 8G" cultivar fertilized with 75 kg.ha-1 of nitrogen.

Distinction and characterisation of salinity tolerant and sensitive rice cultivars as probed by the chlorophyll fluorescence characteristics and growth parameters

2014 ◽  
Vol 41 (7) ◽  
pp. 727 ◽  
Author(s):  
Devendra Pratap Singh ◽  
Ramani Kumar Sarkar
Keyword(s):  
Salt Stress ◽  
Growth Parameters ◽  
Seedling Survival ◽  
Climatic Conditions ◽  
Green Leaf ◽  
Rice Cultivars ◽  
Salt Tolerant ◽  
Wet Season ◽  
Fluorescence Characteristics ◽  
Salt Tolerant Cultivars

Soil salinity is a major abiotic stress that limits rice productivity worldwide. The problem is intense – particularly in areas with extremely dry and hot climatic conditions. Designing an effective phenotyping strategy requires thorough understanding of plant survival under stress. The investigation was conducted using 12 rice cultivars differing in salinity tolerance. Among these cultivars, seedling survival on day 10 of salt treatment (12 dS m–1) was above 85% during wet season and 75% during dry season in FL478, AC39416, Pokkali and Kamini. Highly salt-tolerant cultivars maintained greater proportion of green leaf and chlorophyll content under salt stress. Unlike sensitive cultivars, tolerant cultivars taken up less Na+ and more K+, resulting in lower Na+ : K+ ratio in leaf and sheath. Normalised chlorophyll a fluorescence data revealed that the Fv/Fm and PIABS values decreased on days 3 and 7, respectively, of salt stress in susceptible rice cultivar. Salinity factor index (SFI) calculated by giving different weights to relative PIABS values after variable days of salinity stress clearly distinguished the level of tolerance among rice cultivars. The SFI can be used for grouping of moderately to highly salt-tolerant cultivars based on their tolerance level. We conclude that maintenance of greater proportion of green leaf, and restricted transport of Na+ to sheath and leaf helps the plant to counteract adverse effects of salinity on rice growth.

Identifying novel QTLs for submergence tolerance in rice cultivars IR72 and Madabaru

2011 ◽  
Vol 124 (5) ◽  
pp. 867-874 ◽  
Author(s):  
Endang M. Septiningsih ◽  
Darlene L. Sanchez ◽  
Namrata Singh ◽  
Pamella M. D. Sendon ◽  
Alvaro M. Pamplona ◽  
...  
Keyword(s):  
Submergence Tolerance ◽  
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

scholarly journals Molecular characterization of submergence tolerance genes and locus in the deep-water rice cultivars

2020 ◽  
Vol 16 (4) ◽  
pp. 633-639
Author(s):  
Nguyen Van Cuu ◽  
Nguyen Van Khiem ◽  
Pham Xuan Hoi
Keyword(s):  
Genetic Variation ◽  
Deep Water ◽  
Southern Hybridization ◽  
Submergence Tolerance ◽  
Rice Cultivars ◽  
Submerged Condition ◽  
East Indian ◽  
North East ◽  
Rice Genotypes

Most of the rice cultivars exhibit suspension of growth when submerged to overcome the reduced availability of oxygen. When the situation continues, majority of the cultivars unable to recover after the flood recedes. However, there are fortunately some rice genotypes that can withstand such submerged condition for up to two weeks by adapting two totally opposite mechanisms. One type of cultivars elongates enormously at a very short span of time and the leaves come above the water level. In the second type, they remain under water without any growth. Cultivars of both types tolerate the submergence but the first category easily lodges when flood water recede. In those lines, yields are reduced drastically. In this study, we focus on characterize the genetic variation at the Sub1 locus and to associate its relevance, if any, to submergence tolerance among the deep water landraces. As a first step, seeds of some rice cultivars collected from North-east Indian regions were initially selected for the characterization of genetic variation. The PCR based analysis involving several genes known to be associated with submergence tolerance did not reveal much difference. However, Southern hybridization revealed certain differences between submergence tolerant and susceptible cultivars. Although we did not notice major difference with regard to Sub1 genes when tried with EcoRI and BamHI, differences were noticed with adh1 and RAmy3C genes. Representative, Southern analysis showed the genetic variation among the deep-water cultivars as compared to Swarna and Sub1-Swarna. It is possible that deep-water rice cultivars may not differ in their genome at Sub1 locus but they respond through SNORKEL genes under submergence.

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