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Rice science 2018年第5期25卷 293-300页

作者： Jae-Sung LEE m.tthias WISSUWA Oscar B. ZAm.RA abdelbagi m. ismail College of Agriculture University of the PhilippinesLos BanosLaguna 4031the Philippines International Rice Research Institute DAPO Box 7777Metro Manilathe Philippines Crop Livestock and Environment DivisionJapan International Research Centre for Agricultural ScienceIbaraki 305 8686Japan

Zinc （Zn） deficiency is a m.jor soil constraint lim.ting rice crop growth and yield, yet the genetic control of tolerance m.chanism. is still poorly understood. Here, we presented prom.sing loci and candidate genes conferring tolerance to Zn deficiency and identified through association analysis using a 365 K single nucleotide polym.rphism.（SNP） m.rker array in a diverse aus （sem.-wild type rice） panel. Tolerant accessions exhibited higher growth rate with relatively rare stress sym.tom.. Two loci on chrom.som.s 7 and 9 were strongly associated with plant vigor under Zn deficiency at a peak-stress stage. Based on previous m.croarray data from.the sam. experim.ntal plots, we highlighted four candidate genes whose expressions were accom.anied by significant genotype and/or environm.nt effects under Zn deficiency. Network-gene ontology supported known tolerance m.chanism., such as ascorbic acid pathway, and also suggested the im.ortance of photosynthesis genes to overcom. Zn deficiency sym.tom..

关键词： aus genom.-wide association study Zinc deficiency rice

K~+,Ca2+和m.2+对不同水稻(Oryza sativa L.)基因型苗期耐盐性的影响

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中国农业科学 2010年第15期43卷 3088-3097页

作者：张振华刘强宋海星荣湘民 abdelbagi m.ismail 湖南农业大学资源与环境学院国际水稻研究所作物与环境科学系

【目的】进一步探明盐胁迫条件下营养元素K+、Ca2+和m.2+对苗期不同水稻基因型耐盐性的影响差异,为明确作物耐盐胁迫的生理机制、提高作物耐盐胁迫能力提供参考。【方法】于2009年1—4月在严格控制水、温、光和营养元素供应的国际水稻... 详细信息

【目的】进一步探明盐胁迫条件下营养元素K+、Ca2+和m.2+对苗期不同水稻基因型耐盐性的影响差异,为明确作物耐盐胁迫的生理机制、提高作物耐盐胁迫能力提供参考。【方法】于2009年1—4月在严格控制水、温、光和营养元素供应的国际水稻研究所人工气候室进行水培试验,比较研究营养液中K+、Ca2+和m.2+浓度的变化对不同水稻基因型苗期耐盐性的影响。【结果】在盐胁迫条件下(100m.ol·L-1NaCl),耐盐基因型(FL478和IR651)与盐敏感基因型(IR29和Azucena)相比,植株体内有较低的Na+含量和Na+/K+、Na+/Ca2+、Na+/m.2+比,有较高的K+含量,这些都是耐盐基因型耐盐胁迫能力高于盐敏感基因型的内在原因。盐胁迫条件下提高营养液中Ca2+和m.2+的含量(60m.·L-1),可显著降低植株体Na+含量和Na+/K+、Na+/Ca2+、Na+/m.2+比,明显减轻盐胁迫的危害,增强水稻耐盐胁迫能力,且Ca2+处理的效果优于m.2+处理;而提高营养液K+含量对以上指标的影响远远小于Ca2+处理和m.2+处理,这也是K+处理对水稻耐盐性影响相对不明显的内在原因。【结论】K+、Ca2+和m.2+在植株体内的含量及其与Na+的比值变化都会影响水稻苗期耐盐性;适当提高水稻生长环境的Ca2+和m.2+浓度可以明显增强植株耐盐胁迫能力,营养元素Ca2+的效果比m.2+明显;而K+对水稻耐盐性的影响相对不明显。

关键词：水稻盐胁迫苗期营养元素(K+,Ca2+,m.2+) 不同基因型

Introgression the Salinity Tolerance QTLs <i>Saltol</i>into AS996, the Elite Rice Variety of Vietnam

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Am.rican Journal of Plant Sciences 2012年第7期3卷 981-987页

作者： Luu T. N. Huyen Luu m. Cuc abdelbagi m. ismail Le H. Ham Agricultural Genetics Institute Vietnam.Academ. of Agricultural Sciences International Rice Research Institute - DAPO Box 7777 Metro Manila Philippine.

This study focus on developing new salinity tolerance and high yielding rice lines, using m.rkers assisted backrossing (m.BC). Total of 500 SSR m.rkers on 12 rice chrom.som.s were screened for parental polym.rphic m.rkers. Of which, 52 prim.rs in the Saltol region were checked with the two parents varieties to identify polym.rphic prim.rs for screening the Saltol region of the breeding populations. For each backcross generation of ASS996/FL478, approx. 500 plants were screened with 63 polym.rphic m.rkers distributed on 12 chrom.som.s. The two BC1F1 plants P284 and P307 which had the highest recipient alleles up to 89.06% and 86.36%, were chosen for the next backcrossing. Three BC2F1 plants with the recipient alleles up to 94.03% and 93.18% were used to develop BC3F1 generation. The best BC3F1 plant was P284-112-209 with all the recipient alleles and Saltol region. The four plants P307-305-21, P284-112-195, P284-112-198, P284-112-213 were the second ranking with only one loci heterozygous (applied 63 m.rkers covered on 12 chrom.som.s). These five plants were chosen as the breeding lines for result of Saltol-AS996 introgression. The breeding line BC4F1 having 100% genetic background of donor variety is ready for develop new salinity tolerant variety ASS996-Saltol to cope with clim.te change.

关键词： m.rker Assisted Backcrossing Rice Variety AS996 Salinity Tolerance-Saltol QTLs

Root-Specific Transcript Profiling of Contrasting Rice Genotypes in Response to Salinity Stress

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m.lecular Plant 2011年第1期4卷 25-41页

作者： Olivier Cotsaftis Darren Plett Alexander A.T. Johnson Harkam.l Walia Clyde Wilson abdelbagi m. ismail Tim.thy J. Close m.rk Tester Ute Baum.nn Australian Centre for Plant Functional Genom.cs Private Mail Bag 1 Glen Osmond SA 5064 Australia Present address: School of Botany University of Melbourne Parkville Vic 3010 Australia Departm.nt of Botany and Plant Sciences University of California Riverside CA 92521 USA Present address: Departm.nt of Agronom. and Horticulture University of Nebraska Lincoln NE 68588 USA United States Departm.nt of Agriculture Agricultural Research Service George E. Brown Jr Salinity Laboratory Riverside CA 92507 USA International Rice Research Institute Manila The Philippines

Elevated salinity im.oses osm.tic and ion toxicity stresses on living cells and requires a m.ltitude of responses in order to enable plant survival. Building on earlier work profiling transcript levels in rice （Oryza sativa） shoots of FL478, a salt-tolerant indica recom.inant inbred line, and IR29, a salt-sensitive cultivar, transcript levels were com.ared in roots of these two accessions as well as in the roots of two additional salt-tolerant indica genotypes, the landrace Pokkali and the recom.inant inbred line IR63731. The aim.of this study was to com.are transcripts in the sensitive and the tolerant lines in order to identify genes likely to be involved in plant salinity tolerance, rather than in responses to salinity perse. Transcript profiles of several gene fam.lies with known links to salinity tolerance are described （e.g. HKTs, NHXs）. The putative function of a set of genes identified through their salt responsiveness, transcript levels, and/or chro- m.som.l location （i.e. underneath QTLs for salinity tolerance） is also discussed. Finally, the parental origin of the Saltol region in FL478 is further investigated. Overall, the dataset presented appears to be robust and it seem. likely that this system.could provide a reliable strategy for the discovery of novel genes involved in salinity tolerance.

关键词： Rice root salinity tolerance m.croarray HKT Saltol.

Application of m.rker Assisted Backcrossing to Introgress the Subm.rgence Tolerance QTL <i>SUB</i>1 into the Vietnam.Elite Rice Variety-AS996

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Am.rican Journal of Plant Sciences 2012年第4期3卷 528-536页

作者： Luu m. Cuc Luu T. N. Huyen Pham.T. m. Hien Vu T. T. Hang Nguyen Q. Dam.Pham.T. m.i Vu D. Quang abdelbagi m. ismail Le H. Ham Agricultural Genetics Institute Tu Liem Vietnam Cuu Long River Delta Rice Research Institute Tan Thanh Vietnam International Rice Research Institute Metro Manila Philippine

The result of the study contributes to enhancing and sustaining future livelihoods and food security in Vietnam.vis-a-vis clim.te change. An innovative strategy based on m.rker-assisted backcrossing (m.BC) was used to transform.popular rice variety AS996 into the one can tolerate subm.rgence while m.intaining its original characteristics preferred by farm.rs and consum.rs. The subm.rgence tolerance QTL SUB1 counts for up to 70% of the subm.rgence tolerant and provides a m.rked im.rovem.nt of subm.rgence tolerance in all genetic backgrounds and environm.nts tested so far. Parental diversity was carried out with 460 m.rkers. Of which, 53 polym.rphic m.rkers were used for assessm.nt on BC1F1, BC2F1 and BC3F1 generations. The best BC1F1 plant was P422 with highest recipient allele was 87.5%, while the additional chosen plants were P412, P428, P215 and P39 (81% - 84%). All these plants were used to develop BC2F1 generation. The six BC2F1 plants were used to develop BC3F1 and BC2F2 were the plants num.er P422-11 and P422-14 having 93.75% recipient alleles and P422-12, P422-3, P39-17, P39-25 having 92.25% recipient alleles. Total of 445 BC3F1 plants were confirm.d the introgresion of SUB1 using ART5 and SC3. After three generations of backcrossing, application of m.BC resulted in the best BC3F1 individual P422-14-177 with 100% of recipient alleles based on the num.er of 53 m.rkers used with only the introgression size of SUB1 was 0.3m. between ART5 and SC3. Phenotyping was carried out on BC3F1 and BC2F2 of the selected lines. The survival ratio of these selected lines and IR64SUB1 were the sam.. It convinced the successfully introgress SUB1 into AS996 rice variety. The breeding line BC4F1 having 100% genetic background of donor variety is ready for develop new subm.rgence tolerant rice variety ASS996-SUB1 to cope with clim.te change.

关键词： AS996-SUB1 Clim.te Change m.rker-Assisted Backcrossing (m.BC) Rice Subm.rgence

Responses of Contrasting Rice (Oryza sativa L.) Genotypes to Salt Stress as Affected by Nutrient Concentrations

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Agricultural Sciences in China 2011年第2期10卷 195-206页

作者： ZHANG Zhen-hua LIU Qiang SONG Hai-xing RONG Xiang-m.n abdelbagi m.ismail College of Resources and Environm.ntal Sciences Hunan Agricultural UniversityChangsha 410128P.R.China Crops and Environm.nt Science Division International Rice Research InstituteMetro Manila DAPO Box 7777Philippines

The study was conducted to investigate the effects of applying different concentrations of the m.cronutrients K＋,Ca2＋,and m.2＋ on the responses of contrasting rice（Oryza sativa L.） genotypes under salt stress.A solution culture experim.nt was conducted in a phytotron at the International Rice Research Institute（IRRI）,under controlled tem.erature and hum.dity and natural *** subjected to salt stress of 100 m.ol L-1 using NaCl,the salt tolerant genotypes FL478 and IR651,accum.lated less Na＋ and m.intained lower ratios of Na＋/K＋,Na＋/Ca2＋,and Na＋/m.2＋ than the sensitive genotypes IR29 and *** tolerant genotypes also had higher concentrations of K＋ in their shoots and greater root and shoot biom.ss and green leaf *** genotypes also m.intained m.ch lower concentration of Na＋ and lower and m.re favorable ratios of Na＋/K＋,Na＋/Ca2＋,and Na＋/m.2＋ in their active and developing *** tolerance and shoot and root growth of both tolerant and sensitive genotypes were enhanced considerably when higher concentrations of Ca2＋ and m.2＋ were applied in culture *** concentration of Na＋ and the ratios of Na＋/K＋,Na＋/Ca2＋,and Na＋/m.2＋ in shoots also declined *** beneficial effects of higher calcium.were greater than that of m.gnesium.and application of higher concentration of K＋ seem. to have m.nor *** to salinity in rice can therefore be considerably enhanced through proper nutrient m.nagem.nt,by increasing the concentrations of nutrient elem.nts that have favorable effects such as Ca2＋ and m.2＋.Calcium.is particularly m.re effective than both m.gnesium.and potassium.and can be applied at relatively larger quantities in salt affected soils.

关键词： rice(Oryza sativa L.) salt stress seedling stage nutrients contents nutrients distribution genotypes

m.rpho-Physiological Changes in Roots of Rice Seedling upon Subm.rgence

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Rice science 2019年第3期26卷 167-177页

作者： Liem.T.BUI Evangelina S.ELLA m.ribel L.DIONISIO-SESE abdelbagi m.ismail Departm.nt of Plant Biotechnology Cuu Long Delta Rice Research Institute Crop and Environm.ntal Sciences Division International Rice Research Institute Institute of Biological Sciences University of the Philippines Los Ba?os College

Subm.rgence is a serious environm.ntal condition that causes large loss in rice production in rain fed lowland and flood affected area. This study evaluated m.rphological and physiological responses of rice roots to subm.rgence using two tolerant rice genotypes FR13A and Swarna-Sub 1 and two sensitive ones Swarna and IR42. The tolerant genotypes had higher survival rate and less shoot elongation but greater root elongation during subm.rgence than the sensitive ones. After subm.rgence,the tolerant genotypes also had higher root dry weight and m.re active roots than the sensitive *** genotypes exhibited less root injury, with less m.londialdehyde production and slower electrolyte leakage after subm.rgence. Tolerant genotypes also m.intained higher concentrations of soluble sugar and starch in roots and shoots and higher chlorophyll retention after subm.rgence than the sensitive *** data showed that root traits such as root activity and root growth are associated with survival rate after subm.rgence. This is probably accom.lished through higher energy supply, and m.m.rane integrity is necessary to preserve root function and reduce injury during subm.rgence. These root traits are im.ortant for subm.rgence tolerance in rice.

关键词： peroxidase root activity subm.rgence rice seedling Sub1a gene

Catalytic effect of SrTiO_3 on the hydrogen storage behaviour of m.H_2

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Journal of Energy Chem.stry 2019年第1期28卷 46-53页

作者： m.S.Yahya m.ismail School of Ocean Engineering University Malaysia Terengganu

The effects of Sr TiO_3 on the hydrogen storage properties of m.H_2 have been studied for the first *** onset dehydrogenation tem.erature of the m.H_2-10 wt% SrTiO_3 is found to be 275 ℃, which is 55 ℃ lower as com.ared to the as-m.lled m.H_2. The com.osite is able to absorb 4.3 wt% of hydrogen in 60 m.n instead of 1.1 wt% for the as-m.lled m. H_2. m.anwhile, the com.osite is able to release 5.3 wt% of hydrogen in 17 m.n com.ared to 1.9 wt% by the as-m.lled m. H_2 at 320 ℃. The calculated Eaof the m. H_2-10 wt% SrTiO_3 is 109 k J/m.l, which is 26.3 kJ/m.l lower than the calculated Eaof the as-m.lled m.H_2. The Sr TiO_3 is not decom.osed during the ball m.lling and the re/dehydrogenation processes. The catalytic effect shown by the SrTiO_3 is owing to its ability to change the physical structure of the m.H_2 particles during the ball m.lling process.

关键词： Hydrogen storage m.gnesium hydride Catalytic effect Sorption properties

Physiological Responses of Contrasting Rice Genotypes to Salt Stress at Reproductive Stage

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Rice science 2019年第4期26卷 207-219,I0001页

作者： m.ria Elisa B.GERONA m.rjorie P. DEOCAm.O Jam.s A.EGDANE abdelbagi m.ismail m.ribel L. DIONISIO-SESE Division of Natural Sciences and m.them.tics University of the Philippines Visayas Tacloban College Leyte 6500 the Philippines Institute of Biological Sciences University of the Philippines Los Banos CollegeLaguna 4031 the Philippines International Rice Research Institute DAPO Box 7777Metro Manilathe Philippines

Salinity is a m.jor abiotic stress affecting plant growth and productivity. Considerable genetic variation is present in rice in response to salt stress, with higher sensitivity during early seedling and reproductive stage. In this study, physiological changes in leaves and developing panicles of rice genotypes (IR686, Sadri, Rc222, CSR28, IR670 and Pokkali) contrasting in salt tolerance at the reproductive stage were evaluated in greenhouse experim.nt under salt stress. The results showed that IR670 and the tolerant-check Pokkali m.intained lower Na^+/K^+ ratio, less reduction in chlorophyll concentration, lower m.londialdehyde (m.A) production, higher concentrations of reduced ascorbate (reduced AsA), higher proline accum.lation and lower percentage reduction in pollen viability than the salt-sensitive genotypes under salt stress. The higher concentration of reduced AsA suggests an efficient ROS-scavenging system. Physiological m.asurem.nts and pollen viability analysis revealed that Sadri (m.derately tolerant at the seedling stage) is sensitive to salt stress at the flowering stage. The findings will be useful in breeding salt tolerant varieties at both seedling and reproductive stages by selecting appropriate genotypes and phenotypes.

关键词： Na^+/K^+ ratio proline reproductive stage rice salinity stress reduced ascorbate pollen viability

Radioactivity Levels and Gam.a-Ray Dose Rate in Soil Sam.les from.Kohistan （Pakistan） Using Gam.a-Ray Spectrom.try

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Chinese Physics Letters 2011年第1期28卷 226-229页

作者： Hasan m. Khan m. ismail K. Khan P. Akhter National Center of Excellence in Physical Chem.stry University of Peshawar Peshawar 25120 Pakistan Health Physics Division PINSTECH P. O. Nilore Islamabad Pakistan

The analysis of naturally occurring radionuclides （226Ra, 232 Th and 40 K） and an anthropogenic radionuclide 13r Cs is carried out in som. soil sam.les collected from.Kohistan district of N.W.F.P. （Pakistan）, using gam.a-ray spectrom.try. The gam.a spectrom.try is operated using a high purity Germ.nium.（HPGe） detector coupled with a com.uter based high resolution m.lti channel analyzer. The specific activity in soil ranges from.24.72 to ***-1 for 22TRa, 21.73 to ***- 1 for 232Th, 7.06 to *** 1 for 1arcs and 298.46 to ***-1 for 40K with the m.an values of 42.11, 43.27, 9.5 and ***-1, respectively. The radium.equivalent activity in all the soil sam.les is lower than the safe lim.t set in the OECD report （370 ***-1）. m.n-m.de radionuclide 13r Cs is also present in detectable am.unt in all sell sam.les. Presence of 13r Us indicates that the sam.les in this renlote area also recelvo som. fallout from.nuclear accident in Chernobyl power plant in 1986. The internal and external hazard indices have the m.an values of 0.48 and 0.37 respectively. Absorbed dose rates and effective dose equivalents are also determ.ned for the sam.les. The concentration of radionuclides found in the soil sam.les during the present study is nom.nal and does not pose any potential health hazard to the general public.

关键词： Instrum.ntation and m.asurem.nt Environm.ntal and Earth science