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Journal of Integrative Agriculture 2020年第3期19卷 656-667页

作者： Azam BORZOUEI MirAhmad MOUSAVI SHALMANI Ali ESKANDARI Nuclear Agriculture Research School Nuclear Science and Technology Research Institute(NSTRI)

In order to study the effects of different levels of salt stress and nitrogen(N) on physiological mechanisms,carbon isotope discrimination(△13C),and yield of two wheat cultivars(cv.),a two-year field experiment was carried out during *** treatments included three levels of salt stress(1.3,5.2,and 10.5 dS m^-1),three levels of N(50,100,and 150 kg N ha-1),and two wheat cultivars,Bam and *** salt stress,N application(100 and 150 kg N ha^-1) produced a significant effect on both cultivars with respect to physiological traits,i.e.,net photosynthetic rate(Pn),stomatal conductance(gs),chlorophyll index(Cl),Na^+/K^+ ratio as well as the grain yield(GY).The salt-tolerant and-sensitive cultivars exhibited the maximum values of physio-biochemical and yield attributes at 100 and 150 kg N ha-1,*** results of △13C showed a significant difference(P<0.001) between wheat cultivars under the control and salt *** to our result,salt-tolerant cultivar Bam seems to be more efficient in terms of higher GY,Pn,gs,Cl,and lower Na^+/K^+ ratio as well as higher △13C as compared with salt-sensitive cultivar Toos,under salt ***,a significant positive correlation that observed between △13C and GY,indicated that △13C may be an effective index for indirect selection of yield potential in wheat under irrigation regimes with saline water.

关键词： net photosynthetic rate stomatal conductance chlorophyll index carbon isotope discrimination

Genetic Analysis of carbon isotope discrimination and its Relation to Yield in a Wheat Doubled Haploid Population

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Journal of Integrative Plant Biology 2011年第9期53卷 719-730页

作者： Xianshan Wu Xiaoping Chang Ruilian Jing National Key Facility for Crop Gene Resources and Genetic Improvement Key Laboratory of Crop Germplasm and BiotechnologyMinistry of AgricultureInstitute of Crop ScienceChinese Academy of Agricultural SciencesHaidian DistrictBeijing 100081China

carbon isotope discrimination（△13C） is considered a useful indicator for indirect selection of grain yield（GY） in ***,it is important to evaluate the genetic variation in △13C and its relationship with GY.A doubled haploid（DH） population derived from a cross of two common wheat varieties,Hanxuan 10（H10） and Lumai 14（L14）,was phenotyped for △13C in the flag leaf,GY and yield associated traits in two trials contrasted by water availability,specifically,rain-fed and *** trait loci（QTLs） were identified by single locus and two locus QTL *** for △13C were located on chromosomes 1A,2B,3B,5A,7A and 7B,and QTLs for other traits on all chromosomes except 1A,4D,5A,5B and *** population selected for high △13C had an increased frequency of QTL for high △13C,GY and number of spikes per plant（NSP） when grown under rain-fed conditions and only for high △13C and NSP when grown under irrigated conditions,which was consistent with agronomic performance of the corresponding trait values in the high △13C progeny;that is,significantly greater than that in the low △***,selection for △13C was beneficial in increasing grain yield in rain-fed environments.

关键词： carbon isotope discrimination drought stress QTL wheat yield.

Relationship between carbon isotope discrimination and Grain Yield in Spring Wheat Cultivated under Different Water Regimes

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Journal of Integrative Plant Biology 2007年第10期49卷 1497-1507页

作者： Xing Xu Hanming Yuan Shuhua Li Richard Trethowan Philippe Monneveux Ningxia University Yinchuan China750021 Ningxia Key Laboratory of Agro-Biotechnology Academy of Agriculture and Forestery Sciences Yinchuan China750021 International Center for Maize and Wheat Improvement A.P. 6-641 Mexico D.F. 06600 Mexico SupAgro Montpellier Montpellier Cedex France34060

In C3 plants, carbon isotope discrimination （A） has been proposed as an indirect selection criterion for grain yield. Reported correlations between A and grain yield however, differ highly according to the analyzed organ or tissue, the stage of sampling, and the environment and water regime. In a first experiment carried out in spring wheat during two consecutive seasons in the dry conditions of northwest Mexico （Ciudad Obregon, Sonora）, different water treatments were applied, corresponding to the main water regimes available to spring wheat worldwide, and the relationships between A values of different organs and grain yield were examined. Under terminal （post-anthesis） water stress, grain yield was positively associated with A in grain at maturity and in leaf at anthesis, confirming results previously obtained under Mediterranean environments. Under early （pre-anthesis） water stress and residual moisture stress, the association between grain A and yield was weaker and highly depended on the quantity of water stored in the soil at sowing. No correlation was found between A and grain yield under optimal irrigation. The relationship between A and grain yield was also studied during two consecutive seasons in 20 bread wheat cultivars in the Ningxia region （Northern China）, characterized by winter drought （pre-anthesis water stress）. Wheat was grown under rainfed conditions in two locations （Guyuan and Pengyang） and under irrigated conditions in another two （Yinchuan and Huinong）. In Huinong, the crop was also exposed to salt stress. Highly significant positive associations were found between leaf and grain A and grain yields across the environments. The relationship between A and yield within environments highly depended on the quantity of water stored in the soil at sowing, the quantity and distribution of rainfall during the growth cycle, the presence of salt in the soil, and the occurrence of irrigation before anthesis. These two experiments confirmed the value of

关键词： carbon isotope discrimination drought salinity spring wheat yield.

Influence of aridity on carbon isotope discrimination in leaves of Stipa and other C3 species in central Asian grassland

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Influence of aridity on carbon isotope discrimination in lea...

Contribution of the ear and the flag leaf to grainfilling in durum wheat inferred from the carbon isotope signature: Genotypic and growing conditions effects

ⅩⅪ International Grassland Congress and the Ⅷ International Rangeland Congress

作者： M.Wittmer K.Auerswald R.Tungalag H.Schnyder Technische Universit t M nchen Lehrstuhl f r Gr nlandlehre Am Hochanger 1D-85350 Freising-Weihenstephan. National University of Mongolia Ikh surguulin gudalmj—1 Baga toiruuSukhbataar districtUlaanbaatarMongolia.

＜正＞Introduction The carbon isotope discrimination（A） of C3 ecosystems is sensitive to water *** annual precipitation（MAP） is the most convenient and in some cases even the only known property to quantify water ... 详细信息

关键词： carbon isotope discrimination Stipa C3 plants aridity central Asian grassland

来源： cnki会议评论

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Journal of Integrative Plant Biology 2014年第5期56卷 444-454页

作者： Rut Sanchez-Bragado Abdelhalim Elazab Bangwei Zhou Maria Dolors Serret Jordi Bort Maria Teresa Nieto-Taladriz José Luis Araus Unit of Plant Physiology Department of Plant Biology Faculty of Biology University of Barcelona National Institute for Agricultural and Food Research and Technology (INIA)

The ear, together with the flag leaf, is believed to play a major role as a source of assimilates during grain filling in C3cereals. However, the intrusive nature of most of the available methodologies prevents reaching conclusive results in this regard. This study compares the carbon isotope composition（d13C） in its natural abundance in the water‐soluble fractions of the flag leaf blade and the ear with the d13C of mature kernels to assess the relative contribution of both organs to grain filling in durum wheat（Triticum turgidum L. ***）. The relative contribution of the ear was higher in landraces compared to modern cultivars, as well as in response to nitrogen fertilization and water stress. Such genotypic and environmentally driven differences were associated with changes in harvest index（HI）, with the relative contribution of the ear being negatively associated with HI. In the case of the genotypic differences, the lower relative contribution of the ear in modern cultivars compared with landraces is probably associated with the appearance in the former of a certain amount of source limitation driven by a higher HI. In fact, the relative contribution of the ear was far more responsive to changes in HI in modern cultivars compared with landraces.

关键词： carbon isotope discrimination ear flag leaf grain filling harvest index photosynthesis

Some Physiological Processes Related to Water Use Efficiency of Higher Plants

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Agricultural Sciences in China 2006年第6期5卷 403-411页

作者： GUO Shi-wei ZHOU Yi SONG Na SHEN Qi-rong College of Resources and Environmental Sciences Nanjing Agricultural University Nanjing 210095 P.R.China

Water use efficiency （WUE） of higher plants is of vital importance in the dry-land agricultural ecosystem in terms of the development of water-saving agriculture. Of all the approaches used to improve WUE, the intrinsic water use efficiency （WUET, the ratio of CO2 assimilation rate to transpiration rate） can be a right index, as the variation of WUET is correlated with the physiological and biochemical processes of higher plants. The measurements of leaf gas exchange and carbon isotope discrimination （D^13C） are the two ways to detect the variation in WUEr. This article reviewed some physiological processes related to WUEv, including the relationship between CO2 assimilation and stomatal conductance and WUET and water absorption. The relationship between WUE and aquaporin and the yield are discussed as well.

关键词： water use efficiency gas exchange carbon isotope discrimination water channel

Large-scale changes in ratio of C3 and C4 plants in central Asian grassland during the last century as recovered from wool archives

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Large-scale changes in ratio of C3 and C4 plants in central ...