Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots

Boron (B) is an essential micronutrient showing restricted mobility in plants, except in species that synthesize polyols. The ability of kiwifruit to mobilize B through phloem transport has not yet been confirmed, despite its ability to synthesize the polyol myo-inositol. This study examined kiwifru...

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Autores principales:	Sotomayor,Carlos, Ruiz,Rafael, Muñoz,Luis
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2012
Materias:	Boron foliar absorption kiwifruit phloem mobility stable isotope
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300015
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spelling	oai:scielo:S0718-162020120003000152014-03-10Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshootsSotomayor,CarlosRuiz,RafaelMuñoz,Luis Boron foliar absorption kiwifruit phloem mobility stable isotope Boron (B) is an essential micronutrient showing restricted mobility in plants, except in species that synthesize polyols. The ability of kiwifruit to mobilize B through phloem transport has not yet been confirmed, despite its ability to synthesize the polyol myo-inositol. This study examined kiwifruit plants in which boric acid enriched with the stable 10B isotope was applied to the distal leaves of mixed shoots with flowers. At 24, 72 and 144 h, both 10B-treated and un-treated leaves and flowers from treated shoots were sampled and subsequently analyzed via mass spectrometry to determine the resulting 11B/10B ratios. Control leaves and flowers showed a natural ratio, varying between 3.82 and 4.05. In contrast, the ratios in treated leaves were 1.57 at 24 h,h 2.06 at 72 h (both of which are significantly different from the control) and similar to the control again after 144 h, at 3.83h. In the flowers from shoots with treated leaves, the ratios were 1.31 at 24 h, h1.48 at 72 h (both different from the control) and 3.67 at 144 h (similar to the control). These results indicate that the B solution was absorbed through the leaves and then rapidly re-translocated to B-demanding sinks, such as flowers, within the first 72 h. This finding clearly indicates that kiwifruit can transport boron through the phloem, which is essential knowledge for the correction of leaf and flower B deficiencies through foliar applications.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.39 n.3 20122012-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300015en10.4067/S0718-16202012000300015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Boron foliar absorption kiwifruit phloem mobility stable isotope
spellingShingle	Boron foliar absorption kiwifruit phloem mobility stable isotope Sotomayor,Carlos Ruiz,Rafael Muñoz,Luis Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots
description	Boron (B) is an essential micronutrient showing restricted mobility in plants, except in species that synthesize polyols. The ability of kiwifruit to mobilize B through phloem transport has not yet been confirmed, despite its ability to synthesize the polyol myo-inositol. This study examined kiwifruit plants in which boric acid enriched with the stable 10B isotope was applied to the distal leaves of mixed shoots with flowers. At 24, 72 and 144 h, both 10B-treated and un-treated leaves and flowers from treated shoots were sampled and subsequently analyzed via mass spectrometry to determine the resulting 11B/10B ratios. Control leaves and flowers showed a natural ratio, varying between 3.82 and 4.05. In contrast, the ratios in treated leaves were 1.57 at 24 h,h 2.06 at 72 h (both of which are significantly different from the control) and similar to the control again after 144 h, at 3.83h. In the flowers from shoots with treated leaves, the ratios were 1.31 at 24 h, h1.48 at 72 h (both different from the control) and 3.67 at 144 h (similar to the control). These results indicate that the B solution was absorbed through the leaves and then rapidly re-translocated to B-demanding sinks, such as flowers, within the first 72 h. This finding clearly indicates that kiwifruit can transport boron through the phloem, which is essential knowledge for the correction of leaf and flower B deficiencies through foliar applications.
author	Sotomayor,Carlos Ruiz,Rafael Muñoz,Luis
author_facet	Sotomayor,Carlos Ruiz,Rafael Muñoz,Luis
author_sort	Sotomayor,Carlos
title	Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots
title_short	Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots
title_full	Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots
title_fullStr	Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots
title_full_unstemmed	Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots
title_sort	phloematic mobility of 10boron in kiwifruit (actinidia deliciosa) mixedshoots
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300015
work_keys_str_mv	AT sotomayorcarlos phloematicmobilityof10boroninkiwifruitactinidiadeliciosamixedshoots AT ruizrafael phloematicmobilityof10boroninkiwifruitactinidiadeliciosamixedshoots AT munozluis phloematicmobilityof10boroninkiwifruitactinidiadeliciosamixedshoots
_version_	1714202144116047872

Phloematic mobility of 10Boron in kiwifruit (Actinidia deliciosa) mixedshoots

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