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Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses

This study investigated the effect of NaCl stress on Na(+) and K(+) absorption and transport by roots, nitrogen and phosphorus content in leaves, PSII photochemical activity and reactive oxygen species (ROS) in leaves of mulberry own-root seedlings and grafted seedlings. To determine the response, o...

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Autores principales: Zhang, Huihui, Li, Xin, Zhang, Shubo, Yin, Zepeng, Zhu, Wenxu, Li, Jinbo, Meng, Liang, Zhong, Haixui, Xu, Nan, Wu, Yining, Sun, Guang yu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6297837/
https://www.ncbi.nlm.nih.gov/pubmed/30619391
http://dx.doi.org/10.3389/fpls.2018.01806
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author Zhang, Huihui
Li, Xin
Zhang, Shubo
Yin, Zepeng
Zhu, Wenxu
Li, Jinbo
Meng, Liang
Zhong, Haixui
Xu, Nan
Wu, Yining
Sun, Guang yu
author_facet Zhang, Huihui
Li, Xin
Zhang, Shubo
Yin, Zepeng
Zhu, Wenxu
Li, Jinbo
Meng, Liang
Zhong, Haixui
Xu, Nan
Wu, Yining
Sun, Guang yu
author_sort Zhang, Huihui
collection PubMed
description This study investigated the effect of NaCl stress on Na(+) and K(+) absorption and transport by roots, nitrogen and phosphorus content in leaves, PSII photochemical activity and reactive oxygen species (ROS) in leaves of mulberry own-root seedlings and grafted seedlings. To determine the response, own-root seedlings of a high yielding mulberry cultivar, Tieba mulberry (Morus alba L.), and the grafted seedlings, obtained by using Qinglong mulberry with high salt tolerance as rootstock and Tieba mulberry as scion, were used. The Na(+) content in roots and leaves of grafted seedlings was significantly lower than that in own-root seedlings under salt stress; while K(+) content in roots and leaves of grafted seedlings was significantly higher than that in own-root seedlings. The root activity in grafted seedlings was significantly higher than that in own-root seedlings, as well as the content of nitrogen, phosphorous and water. PSII photochemical activity in leaves of grafted seedlings was less significantly affected by salt stress compared to own-root seedlings. The electron transport at the acceptor side of PSII from Q(A) to Q(B) was less affected by salt stress, which resulted in a significantly lower ROS content in leaves of grafted seedlings than that of own-root seedlings. Therefore, grafting high-yielding and good-quality Tieba mulberry with salt tolerant Qinglong mulberry as rootstock showed a relatively high salt tolerance. This may be because (1) the root system of rootstock presented high Na(+) resistance and has selective absorption capacity for Na(+) and K(+) (2) the root system of rootstock prevented excess Na(+) from being transported to aerial parts in order to reduce adverse effects of Na(+) (3) the root system of rootstock had enhanced root activity under salt stress, which accelerated water and nutrient absorption (4) the leaves of grafted seedlings had higher PSII photochemical activity and electron transport rate compared with those of own-root seedlings under salt stress, which effectively reduced ROS burst mediated by photosynthesis and reduced oxidative damage.
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spelling pubmed-62978372019-01-07 Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses Zhang, Huihui Li, Xin Zhang, Shubo Yin, Zepeng Zhu, Wenxu Li, Jinbo Meng, Liang Zhong, Haixui Xu, Nan Wu, Yining Sun, Guang yu Front Plant Sci Plant Science This study investigated the effect of NaCl stress on Na(+) and K(+) absorption and transport by roots, nitrogen and phosphorus content in leaves, PSII photochemical activity and reactive oxygen species (ROS) in leaves of mulberry own-root seedlings and grafted seedlings. To determine the response, own-root seedlings of a high yielding mulberry cultivar, Tieba mulberry (Morus alba L.), and the grafted seedlings, obtained by using Qinglong mulberry with high salt tolerance as rootstock and Tieba mulberry as scion, were used. The Na(+) content in roots and leaves of grafted seedlings was significantly lower than that in own-root seedlings under salt stress; while K(+) content in roots and leaves of grafted seedlings was significantly higher than that in own-root seedlings. The root activity in grafted seedlings was significantly higher than that in own-root seedlings, as well as the content of nitrogen, phosphorous and water. PSII photochemical activity in leaves of grafted seedlings was less significantly affected by salt stress compared to own-root seedlings. The electron transport at the acceptor side of PSII from Q(A) to Q(B) was less affected by salt stress, which resulted in a significantly lower ROS content in leaves of grafted seedlings than that of own-root seedlings. Therefore, grafting high-yielding and good-quality Tieba mulberry with salt tolerant Qinglong mulberry as rootstock showed a relatively high salt tolerance. This may be because (1) the root system of rootstock presented high Na(+) resistance and has selective absorption capacity for Na(+) and K(+) (2) the root system of rootstock prevented excess Na(+) from being transported to aerial parts in order to reduce adverse effects of Na(+) (3) the root system of rootstock had enhanced root activity under salt stress, which accelerated water and nutrient absorption (4) the leaves of grafted seedlings had higher PSII photochemical activity and electron transport rate compared with those of own-root seedlings under salt stress, which effectively reduced ROS burst mediated by photosynthesis and reduced oxidative damage. Frontiers Media S.A. 2018-12-11 /pmc/articles/PMC6297837/ /pubmed/30619391 http://dx.doi.org/10.3389/fpls.2018.01806 Text en Copyright © 2018 Zhang, Li, Zhang, Yin, Zhu, Li, Meng, Zhong, Xu, Wu and Sun. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Zhang, Huihui
Li, Xin
Zhang, Shubo
Yin, Zepeng
Zhu, Wenxu
Li, Jinbo
Meng, Liang
Zhong, Haixui
Xu, Nan
Wu, Yining
Sun, Guang yu
Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses
title Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses
title_full Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses
title_fullStr Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses
title_full_unstemmed Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses
title_short Rootstock Alleviates Salt Stress in Grafted Mulberry Seedlings: Physiological and PSII Function Responses
title_sort rootstock alleviates salt stress in grafted mulberry seedlings: physiological and psii function responses
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6297837/
https://www.ncbi.nlm.nih.gov/pubmed/30619391
http://dx.doi.org/10.3389/fpls.2018.01806
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