Does radiation interception or radiation use efficiency limit the growth of wheat inoculated with tan spot or leaf rust?
Tan spot [Pyrenophora tritici-repentis [Died.] Drechs., anamorph Drechslera tritici-repentis] [Died.]Shoem.]and leaf rust [Puccinia triticina Eriks] are major diseases worldwide and some of the main biotic causesof yield and quality reduction in wheat [Triticum aestivum L.]. Although wheat crop los...
| Otros Autores: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2016schierenbeck.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 008 | 181208t2016 |||||o|||||00||||eng d | ||
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| 022 | |a 0378-4290 | ||
| 024 | |a 10.1016/j.fcr.2016.09.017 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 245 | 1 | 0 | |a Does radiation interception or radiation use efficiency limit the growth of wheat inoculated with tan spot or leaf rust? |
| 520 | |a Tan spot [Pyrenophora tritici-repentis [Died.] Drechs., anamorph Drechslera tritici-repentis] [Died.]Shoem.]and leaf rust [Puccinia triticina Eriks] are major diseases worldwide and some of the main biotic causesof yield and quality reduction in wheat [Triticum aestivum L.]. Although wheat crop losses due to foliardiseases have already been studied based on an ecophysiological approach, none of these studies ana-lyzed the independent effects of foliar pathogens with different nutritional habits. The aim of the presentstudy was to determine the independent effects of [i] Py. tritici-repentis [necrothroph] and [ii] Pucciniatriticina [biotroph] on the physiological components of biomass production: accumulated intercepted bygreen tissue photosynthetic active radiation [IGPAR], radiation use efficiency calculated by interceptedradiation [RUEint] as well as by intercepted by green tissue [RUEgt] in a wide range of Argentine com-mercial bread wheat cultivars growing in two field environments. Field experiments were carried outduring two consecutive years combining a large range of wheat bread commercial cultivars and twolevels of inoculation to promote infection of Tan spot and Leaf rust diseases, including a control withoutinoculation. Treatments were arranged in an experimental split-split plot design with three replications,where the main plots were both diseases, subplots corresponded to inoculation treatments 1- withoutinoculation [WI], 2- low concentration of inoculum of each disease [LC], 3- high concentration of inocu-lum of each disease [HC] and ten Argentine bread wheat commercial cultivars were the sub-subplots.Area under disease progress [AUDPC], area under percentage of non-green leaf area [AU per cent NGLA], cropgrowth rate [CGR] and healthy area duration [HAD] were calculated. Green leaf area index [GLAI], above-ground biomass [AGB], IGPAR and RUE were measured at three different crop stages [GS39, GS61 andGS82]. Increases of inoculum concentration decreased AGB between 8 and 20 per cent mainly explained byreductions in HAD and decreases on IGPAR by 14-18 per cent with higher reductions when the crop was inoc-ulated with Py. tritici-repentis than with P. triticina. Although both diseases reduced the physiologicalcomponents of accumulated biomass related to radiation interception [IGPAR], RUEint [-23 per cent], RUEgt[-11 per cent] and CGR [-29 per cent] were more reduced, respect to WI, when plants were inoculated with P. triticinacompared to Pyrenophora tritici-repentis. The differential responses in RUE could be associated with thenutritional habit of P. triticina that reduces leaf nitrogen concentration, enhance assimilates consume byleaf respiration, reducing radiation use efficiency. | ||
| 653 | 0 | |a WHEAT | |
| 653 | 0 | |a RADIATION USE EFFICIENCY | |
| 653 | 0 | |a RADIATION INTERCEPTION | |
| 653 | 0 | |a BIOMASS | |
| 653 | 0 | |a PYRENOPHORA TRITICI REPENTIS | |
| 653 | 0 | |a PUCCINIA TRITICINA | |
| 700 | 1 | |a Schierenbeck, Matías |9 70286 | |
| 700 | 1 | |9 70287 |a Fleitas, Maria Constanza | |
| 700 | 1 | |9 6438 |a Miralles, Daniel Julio | |
| 700 | 1 | |9 69769 |a Simón, María Rosa | |
| 773 | |t Field Crops Research |g Vol.199 (2016), p.65-76, tbls., grafs. | ||
| 856 | |u http://ri.agro.uba.ar/files/intranet/articulo/2016schierenbeck.pdf |i En reservorio |q application/pdf |f 2016schierenbeck |x MIGRADOS2018 | ||
| 856 | |u https://www.elsevier.com |x MIGRADOS2018 |z LINK AL EDITOR | ||
| 942 | 0 | 0 | |c ARTICULO |
| 942 | 0 | 0 | |c ENLINEA |
| 976 | |a AAG | ||