caa a22 4500 397521847 CHVBK 20180308164635.0 cr unu---uuuuu 161202e199507 xx s 000 0 eng 10.1093/jxb/46.7.753 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.7.753 Are phytochrome-mediated effects on leaf growth, carbon partitioning and extractable sucrose-phosphatesynthase activity the mere consequence of stem-growthresponses in light-grown mustard? [Elektronische Daten] [M.J. Yanovsky, J.J. Casal, G.L. Salerno, R.A. Sanchez] Growth, carbohydrate pools and extractable sucrose-phosphate synthase (SPS) activity were studied in the leaves of light-grown mustard seedlings exposed tored or far-red end-of-day light pulses. Over a single dark period far-red, compared to red light (a) had no effect on leaf amounts of reducing sugars, sucrose, starch, and hemicellulose, (b) reduced cellulose accu-mulation in the leaves, and (c) caused a rapid promo-tion of extractable activity for SPS (lag ≻≻0.5 h, ≺1 h).Within a plant, one leaf of the first pair was coveredwhile the other leaf and the rest of the shoot were exposed to end-of-day far-red. The leaf exposed to far-red showed (a) lower rates of extension growth, (b)reduced accumulation of dry matter and structural carbohydrates, and (c) higher activities of SPS, thanthe leaf covered during the far-red pulse, despite the fact that both leaves were attached to the same inter-node. We conclude that phytochrome-mediated effectson leaf growth, carbon partitioning and extractable SPS activity are not the mere consequence of changes in in ternode growth and carbon demand. © Oxford University Press Research Papers nationallicence Carbon partitioning nationallicence cellulose nationallicence leaf growth nationallicence phytochrome nationallicence sucrose-phosphate synthase nationallicence Yanovsky M.J. Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires Avenida San Martin 4453,1417-Buenos Aires, Argentina aut Casal J.J. Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires Avenida San Martin 4453,1417-Buenos Aires, Argentina aut Salerno G.L. Centro de Investigaciones Biologicas, FIBA CC 1348, Mar del Plata, Argentina aut Sanchez R.A. Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires Avenida San Martin 4453,1417-Buenos Aires, Argentina aut Journal of Experimental Botany Oxford University Press 46/7(1995-07), 753-757 0022-0957 46:7<753 1995 46 exbotj https://doi.org/10.1093/jxb/46.7.753 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.7.753 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yanovsky M.J. Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires Avenida San Martin 4453,1417-Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Casal J.J. Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires Avenida San Martin 4453,1417-Buenos Aires, Argentina aut NATIONALLICENCE 700 1- Salerno G.L. Centro de Investigaciones Biologicas, FIBA CC 1348, Mar del Plata, Argentina aut NATIONALLICENCE 700 1- Sanchez R.A. Departamento de Ecologia, Facultad de Agronomia, Universidad de Buenos Aires Avenida San Martin 4453,1417-Buenos Aires, Argentina aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/7(1995-07), 753-757 0022-0957 46:7<753 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford