Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia
Silicon (Si) is a beneficial element for plants. To understand Si uptake and accumulation in poinsettia, the Si transporters and their expression patterns were investigated. Nodulin 26-like intrinsic membrane proteins (NIPs) act as transporters of water and small solutes, including silicic acid. In...
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doaj-0e5fb35b1087493cb4bd307f4acb958f2020-11-25T02:41:19ZengMDPI AGPlants2223-77472020-04-01956956910.3390/plants9050569Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in PoinsettiaJiangtao Hu0Yali Li1Byoung Ryong Jeong2Department of Horticulture, Division of Applied Life Science (BK21 Plus Program), Graduate School of Gyeongsang National University, Jinju 52828, KoreaDepartment of Horticulture, Division of Applied Life Science (BK21 Plus Program), Graduate School of Gyeongsang National University, Jinju 52828, KoreaDepartment of Horticulture, Division of Applied Life Science (BK21 Plus Program), Graduate School of Gyeongsang National University, Jinju 52828, KoreaSilicon (Si) is a beneficial element for plants. To understand Si uptake and accumulation in poinsettia, the Si transporters and their expression patterns were investigated. Nodulin 26-like intrinsic membrane proteins (NIPs) act as transporters of water and small solutes, including silicic acid. In this study, one NIP member, designated EpLsi1, was identified. Additionally, a protein from the citrate transporter family, designated EpLsi2, was identified. Sequence analyses indicated that EpLsi1 belonged to the NIP-I subgroup, which has a low Si uptake capacity. Consistently, the measured tissue Si content in the poinsettia was less than 1.73 ± 0.17 mg·g<sup>−1</sup> dry weight, which was very low when compared to that in high Si accumulators. The expressions of <i>EpLsi1</i> and <i>EpLsi2</i> in poinsettia cuttings treated with 0 mg·L<sup>−1</sup> Si decreased under temperature stresses. A short-term Si supplementation decreased the expressions of both <i>EpLsi1</i> and <i>EpLsi2</i> in the roots and leaves, while a long-term Si supplementation increased the expression of <i>EpLsi1</i> in the leaves, bracts, and cyathia, and increased the expression of <i>EpLsi2</i> in the roots and leaves. Tissue Si content increased in the roots of cuttings treated with 75 mg·L<sup>−1</sup> Si at both 4 and 40 °C, indicating that the transport activities of the EpLsi1 were enhanced under temperature stresses. A long-term Si supplementation increased the tissue Si content in the roots of poinsettia treated with 75 mg·L<sup>−1</sup> Si. Overall, poinsettia was a low Si accumulator, the expressions of Si transporters were down-regulated, and the tissue Si content increased with temperature stresses and Si supplementation. These results may help the breeding and commercial production of poinsettia.https://www.mdpi.com/2223-7747/9/5/569gene expressionLsi1Lsi2silicon contentstress |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jiangtao Hu Yali Li Byoung Ryong Jeong |
spellingShingle |
Jiangtao Hu Yali Li Byoung Ryong Jeong Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia Plants gene expression Lsi1 Lsi2 silicon content stress |
author_facet |
Jiangtao Hu Yali Li Byoung Ryong Jeong |
author_sort |
Jiangtao Hu |
title |
Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia |
title_short |
Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia |
title_full |
Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia |
title_fullStr |
Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia |
title_full_unstemmed |
Putative Silicon Transporters and Effect of Temperature Stresses and Silicon Supplementation on Their Expressions and Tissue Silicon Content in Poinsettia |
title_sort |
putative silicon transporters and effect of temperature stresses and silicon supplementation on their expressions and tissue silicon content in poinsettia |
publisher |
MDPI AG |
series |
Plants |
issn |
2223-7747 |
publishDate |
2020-04-01 |
description |
Silicon (Si) is a beneficial element for plants. To understand Si uptake and accumulation in poinsettia, the Si transporters and their expression patterns were investigated. Nodulin 26-like intrinsic membrane proteins (NIPs) act as transporters of water and small solutes, including silicic acid. In this study, one NIP member, designated EpLsi1, was identified. Additionally, a protein from the citrate transporter family, designated EpLsi2, was identified. Sequence analyses indicated that EpLsi1 belonged to the NIP-I subgroup, which has a low Si uptake capacity. Consistently, the measured tissue Si content in the poinsettia was less than 1.73 ± 0.17 mg·g<sup>−1</sup> dry weight, which was very low when compared to that in high Si accumulators. The expressions of <i>EpLsi1</i> and <i>EpLsi2</i> in poinsettia cuttings treated with 0 mg·L<sup>−1</sup> Si decreased under temperature stresses. A short-term Si supplementation decreased the expressions of both <i>EpLsi1</i> and <i>EpLsi2</i> in the roots and leaves, while a long-term Si supplementation increased the expression of <i>EpLsi1</i> in the leaves, bracts, and cyathia, and increased the expression of <i>EpLsi2</i> in the roots and leaves. Tissue Si content increased in the roots of cuttings treated with 75 mg·L<sup>−1</sup> Si at both 4 and 40 °C, indicating that the transport activities of the EpLsi1 were enhanced under temperature stresses. A long-term Si supplementation increased the tissue Si content in the roots of poinsettia treated with 75 mg·L<sup>−1</sup> Si. Overall, poinsettia was a low Si accumulator, the expressions of Si transporters were down-regulated, and the tissue Si content increased with temperature stresses and Si supplementation. These results may help the breeding and commercial production of poinsettia. |
topic |
gene expression Lsi1 Lsi2 silicon content stress |
url |
https://www.mdpi.com/2223-7747/9/5/569 |
work_keys_str_mv |
AT jiangtaohu putativesilicontransportersandeffectoftemperaturestressesandsiliconsupplementationontheirexpressionsandtissuesiliconcontentinpoinsettia AT yalili putativesilicontransportersandeffectoftemperaturestressesandsiliconsupplementationontheirexpressionsandtissuesiliconcontentinpoinsettia AT byoungryongjeong putativesilicontransportersandeffectoftemperaturestressesandsiliconsupplementationontheirexpressionsandtissuesiliconcontentinpoinsettia |
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