Irrigated rice genotype performance under excess iron stress in hydroponic culture

Introduction: The development of tolerant rice genotypes is the main tool to minimize the problem caused by the excess of iron in the soil. Aims: The study aims to evaluate the response of genotypes of the Embrapa breeding program of irrigated rice against iron stress, as well as to envision the relationship of the effect of this disorder on leaf mass production in different phenological phases of the plant. Study Design: The trial was established in a randomized block design with additional controls, with the plots consisting of four rows 3 m long with 0.20 m spacing between rows. Place and Duration of Study: The experiment was conducted in the experimental field of Embrapa Temperate Climate Lowlands Station, in a period of nine years, consisting of the harvest of 2006/2007 until 2014/2015. Methodology: It was evaluated 255 lines along with 4 additional control cultivars with known tolerance levels. The symptoms were evaluated at 40, 70 and 100 days after plant emergence through a visual assessment in the field, based on the standard evaluation system for rice. In addition to the determination of the average toxicity levels of genotypes, the mass was collected, constituted by the dry matter of shoot, for the detection of interrelationships through their correlations. Results: It was found that 58.82% of the developed irrigated rice lines show good tolerance to toxicity by excess iron. The association of the content of dry matter of shoots and the levels of indirect toxicity of iron showed a significant negative correlation (-0.6848), being that the highest magnitude of negative correlation was at 70 DAE (-0.6161). Conclusion: There is variability for tolerance to indirect iron toxicity between the irrigated rice genotypes assessed. The breeding program of irrigated rice of Embrapa has been effective in developing genotypes with tolerance by excess iron in the soil over nine years. There is a negative association between the content of dry matter of shoots and the levels of indirect iron toxicity.

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Symptom evolution in rice genotypes under iron toxicity conditions

Journal of the Institute of Agriculture and Animal Science ◽

10.3126/jiaas.v33i0.20697 ◽

2018 ◽

pp. 147-150

Author(s):

R. K. Shrestha ◽

M. Becker

Keyword(s):

Vapor Pressure ◽

Vapor Pressure Deficit ◽

Iron Toxicity ◽

Hydroponic Culture ◽

Iron Stress ◽

Atmospheric Conditions ◽

Greenhouse Study ◽

High Vapor ◽

Rice Genotypes ◽

The University

A greenhouse study was conducted in the University of Bonn, Germany during July-September, 2009 to comparatively evaluate six contrasting lowland rice genotypes, viz. IR31785, Nipponbare, WAS161, CK73, TOX3107 and Pokkali at increasing rates of Fe (II) under both dry and moist atmospheric conditions. Plants were grown in hydroponic culture for 35-days and subjected to 4-day Fe(II) pulses of 5 (control), 500, 1000 and 1500 mg Fe2+ L-1 under conditions of low (0.3Kpa) and high (2.4 Kpa) vapor pressure deficit. Rice genotypes expressed earlier and intense leaf bronzing symptoms with increasing Fe2+ stress and as the atmosphere became drier. However, genotypes significantly differed with regards to their response to iron stress. Some of the genotypes were able to maintain low leaf bronzing symptoms under higher level of iron stress and high vapor pressure deficit condition.Journal of the Institute of Agriculture and Animal Science.Vol. 33-34, 2015, Page: 147-150

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Responses of Selected Indonesian Rice Varieties under Excess Iron Condition in Media Culture at Seedling Stage

Jurnal Penelitian Pertanian Tanaman Pangan ◽

10.21082/jpptp.v35n3.2016.p181-190 ◽

2016 ◽

Vol 35 (3) ◽

pp. 181

Author(s):

Yudhistira Nugraha ◽

Sintho Wahyuning Ardie ◽

Indrastuti A. Rumanti ◽

...

Keyword(s):

Biomass Accumulation ◽

Rice Seedling ◽

Iron Toxicity ◽

Media Culture ◽

Iron Stress ◽

Rice Varieties ◽

Rice Productivity ◽

Excess Iron ◽

Rice Genotypes ◽

Highly Correlated

Iron toxicity could limit rice productivity on irrigated lowland acid and swampy soil. The use of iron toxicity tolerant rice is an alternative strategy to improve rice productivity in these areas. We studied the phenotypic variation of twenty-four rice genotypes and characterized the fate of Fe2+ along its path between the roots and shoot of rice plant. Twenty-four rice genotypes form different agro-ecosystem were grown under agar nutrient solution conditions with 400 mg. L-1 iron stress and under normal condition. We found variation in the biomass accumulation of rice seedling during stress of iron namely, high accumulated biomass tolerant type and low accumulate biomass tolerant type. The relative biomass weight was highly correlated with the leaf bronzing scores (LBS) under excess iron. Based on these categorizations, we chose six genotypes to observe the present of Fe in root and shoot using invivo-staining 2,2 bypiridine. The result indicated that some genotypes were able to develop root and shoot aerenchym during iron stress. This was related to the development on root iron plaque and the iron content of the shoot of the rice seedling. In this present study, rice genotypes could be classified as the includer tolerant type (Inpara 2) and some others were the excluder tolerant type (Mahsuri, Pokkali and Siam Saba). This information on tolerance strategies is important for rice breeder to develop physiological-based breeding program of iron-toxicity tolerant in rice.

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Development of Molecular Markers for Iron Metabolism Related Genes in Lentil and Their Expression Analysis under Excess Iron Stress

Frontiers in Plant Science ◽

10.3389/fpls.2017.00579 ◽

2017 ◽

Vol 8 ◽

Author(s):

Debjyoti Sen Gupta ◽

Kevin McPhee ◽

Shiv Kumar

Keyword(s):

Molecular Markers ◽

Expression Analysis ◽

Iron Metabolism ◽

Iron Stress ◽

Excess Iron

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Tolerance mechanisms and irrigation management to reduce iron stress in irrigated rice

Plant and Soil ◽

10.1007/s11104-021-05156-9 ◽

2021 ◽

Author(s):

Felipe de Campos Carmona ◽

Janete Mariza Adamski ◽

Andriele Wairich ◽

Joseane Biso de Carvalho ◽

Gustavo Gomes Lima ◽

...

Keyword(s):

Irrigation Management ◽

Iron Stress ◽

Tolerance Mechanisms ◽

Irrigated Rice

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Effects of hydroponic culture system and NaCl on interactions between common bean lines and native rhizobia from Tunisian soils

Agronomie ◽

10.1051/agro:2001150 ◽

2001 ◽

Vol 21 (6-7) ◽

pp. 601-605 ◽

Cited By ~ 17

Author(s):

Moez Jebara ◽

Jean-Jacques Drevon ◽

Mohamed Elarbi Aouani

Keyword(s):

Common Bean ◽

Culture System ◽

Hydroponic Culture

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Pengaruh Konversi Lahan terhadap Strategi Pemanfaatan Modal Nafkah Rumah Tangga Buruh Tani

Jurnal Sains Komunikasi dan Pengembangan Masyarakat [JSKPM] ◽

10.29244/jskpm.4.3.407-420 ◽

2020 ◽

Vol 4 (3) ◽

pp. 407

Author(s):

Hesti Prastiwi ◽

Martua Sihaloho

Keyword(s):

Qualitative Data ◽

Rice Fields ◽

Livelihood Strategies ◽

Quantitative Approach ◽

Survey Method ◽

Land Conversion ◽

Literature Study ◽

Irrigated Rice ◽

Sustainable Food ◽

The Impact

Lahan merupakan salah satu sumber daya agraria yang sangat penting bagi petani dikarenakan lahan merupakan salah satu sumber untuk bertahan hidup. Sesuai dengan Undang-Undang Dasar Nomor 41 Tahun 2009 tentang Perlindungan Lahan Pertanian Pangan Berkelanjutan. Pembangunan yang terjadi di Indonesia semakin masif, menimbulkan konversi lahan bersifat permanen ketika lahan sawah beririgasi berubah menjadi kawasan pemukiman atau industri. Konversi lahan yang terjadi menyebabkan hilangnya beberapa atau seluruh modal nafkah yang ada. Perubahan modal nafkah ini akan mengakibatkan perubahan strategi nafkah petani. Penelitian ini bertujuan untuk menganalisis dampak konversi lahan terhadap strategi nafkah dan pengaruh pemanfaatan modal nafkah terhadap strategi nafkah rumah tangga. Lokasi penelitian ini yaitu Desa Pasirgaok, Kecamatan Rancabungur, Kabupaten Bogor. Metode yang digunakan untuk menggali fakta, data, dan informasi dalam penelitian adalah pendekatan kuantitatif melalui metode survei dengan kuesioner yang didukung oleh data kualitatif melalui wawancara dan studi literatur hingga diperoleh hasil bahwa dampak konversi lahan mempengaruhi modal dan strategi nafkah.Kata Kunci: buruh tani, konversi lahan, modal nafkah, strategi nafkah=====ABSTRACTLand is one of the most important agrarian resources for farmers because land is one source of livelihood survival. According to Constitution Number 41 Year 2009 on concerning The Protection of Sustainable Food Agriculture. The development that is taking place in Indonesia is increasingly massive leading to permanent land conversion when technical irrigated rice fields change into residential or industrial areas. The land conversion that occurs causes a loss of some or all existing livelihood asset. This change in livelihood asset will result in a change in farmers livelihood strategies. This study aims to analyze the influence of the impact of land conversion towards livelihood strategies and the influence of the utilization of livelihood asset towards the livelihood strategies households. The location of this research is Pasirgaok Village, Rancabungur District, Bogor Regency. The method used to extract facts, data, and information in the research is the quantitative approach through survey method with questionnaires supported by qualitative data through interview and literature study until it is obtained that the impact of land conversion towards landless farmer household’s assets and livelihood strategies.Keywords: land conversion, landless farmer, livelihood asset, livelihood strategies

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