The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency
The low-auxin-sensitivity tomato mutant, dgt, despite displaying reduced plant growth, has been linked to greater resistance to N deficiency. This led us to test the role of auxin resistance of dgt in NH toxicity and N deficiency, compared to wild type tomato (cv. Micro-Tom, MT), grown in hydroponic media. A completely randomized design with three replications in a 2 × 4 factorial scheme was adopted, corresponding to the two tomato genotypes (MT and dgt), involving four nutritional treatments: NO (5 mM); NH (5 mM); NO (5 mM) plus exogenous auxin (10 μM IAA); and N omission. The results show that NH was toxic to MT but not to dgt. Under N deficiency, MT displayed a lower shoot NO content, a lower photosynthetic rate, and a decrease in both shoot and root dry weight. However, in dgt, no difference was observed in shoot NO content and photosynthetic rate between plants grown on NO or under N deficiency. In addition, dgt showed an increase in shoot dry weight under N deficiency. We highlight the role of auxin resistance in the adaptation of plants to NH toxicity and N deficiency.
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Elsevier BV
2020-09
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| Subjects: | Low nitrogen, Ammonium toxicity, Nitrogen limitation adaptationIndoleacetic acid, |
| Online Access: | http://hdl.handle.net/10261/227983 |
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dig-idab-es-10261-2279832021-01-29T05:04:40Z The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency Nascimento Santos, Luiz Cláudio Ferreira Barreto, Rafael Mello Prado, Renato Pereira Silva, Gilmara Rodrigues Santos, Janaína Maria Lasa, Berta Aparicio-Tejo, Pedro María Aranjuelo, Iker Falleiros Carvalho, Rogério Low nitrogen Ammonium toxicity Nitrogen limitation adaptationIndoleacetic acid The low-auxin-sensitivity tomato mutant, dgt, despite displaying reduced plant growth, has been linked to greater resistance to N deficiency. This led us to test the role of auxin resistance of dgt in NH toxicity and N deficiency, compared to wild type tomato (cv. Micro-Tom, MT), grown in hydroponic media. A completely randomized design with three replications in a 2 × 4 factorial scheme was adopted, corresponding to the two tomato genotypes (MT and dgt), involving four nutritional treatments: NO (5 mM); NH (5 mM); NO (5 mM) plus exogenous auxin (10 μM IAA); and N omission. The results show that NH was toxic to MT but not to dgt. Under N deficiency, MT displayed a lower shoot NO content, a lower photosynthetic rate, and a decrease in both shoot and root dry weight. However, in dgt, no difference was observed in shoot NO content and photosynthetic rate between plants grown on NO or under N deficiency. In addition, dgt showed an increase in shoot dry weight under N deficiency. We highlight the role of auxin resistance in the adaptation of plants to NH toxicity and N deficiency. 2021-01-28T17:10:06Z 2021-01-28T17:10:06Z 2020-09 2021-01-28T17:10:07Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.jplph.2020.153243 issn: 0176-1617 Journal of Plant Physiology 252: 153243 (2020) http://hdl.handle.net/10261/227983 10.1016/j.jplph.2020.153243 http://dx.doi.org/10.1016/j.jplph.2020.153243 Sí none Elsevier BV |
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Low nitrogen Ammonium toxicity Nitrogen limitation adaptationIndoleacetic acid Low nitrogen Ammonium toxicity Nitrogen limitation adaptationIndoleacetic acid |
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Low nitrogen Ammonium toxicity Nitrogen limitation adaptationIndoleacetic acid Low nitrogen Ammonium toxicity Nitrogen limitation adaptationIndoleacetic acid Nascimento Santos, Luiz Cláudio Ferreira Barreto, Rafael Mello Prado, Renato Pereira Silva, Gilmara Rodrigues Santos, Janaína Maria Lasa, Berta Aparicio-Tejo, Pedro María Aranjuelo, Iker Falleiros Carvalho, Rogério The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| description |
The low-auxin-sensitivity tomato mutant, dgt, despite displaying reduced plant growth, has been linked to greater resistance to N deficiency. This led us to test the role of auxin resistance of dgt in NH toxicity and N deficiency, compared to wild type tomato (cv. Micro-Tom, MT), grown in hydroponic media. A completely randomized design with three replications in a 2 × 4 factorial scheme was adopted, corresponding to the two tomato genotypes (MT and dgt), involving four nutritional treatments: NO (5 mM); NH (5 mM); NO (5 mM) plus exogenous auxin (10 μM IAA); and N omission. The results show that NH was toxic to MT but not to dgt. Under N deficiency, MT displayed a lower shoot NO content, a lower photosynthetic rate, and a decrease in both shoot and root dry weight. However, in dgt, no difference was observed in shoot NO content and photosynthetic rate between plants grown on NO or under N deficiency. In addition, dgt showed an increase in shoot dry weight under N deficiency. We highlight the role of auxin resistance in the adaptation of plants to NH toxicity and N deficiency. |
| format |
artículo |
| topic_facet |
Low nitrogen Ammonium toxicity Nitrogen limitation adaptationIndoleacetic acid |
| author |
Nascimento Santos, Luiz Cláudio Ferreira Barreto, Rafael Mello Prado, Renato Pereira Silva, Gilmara Rodrigues Santos, Janaína Maria Lasa, Berta Aparicio-Tejo, Pedro María Aranjuelo, Iker Falleiros Carvalho, Rogério |
| author_facet |
Nascimento Santos, Luiz Cláudio Ferreira Barreto, Rafael Mello Prado, Renato Pereira Silva, Gilmara Rodrigues Santos, Janaína Maria Lasa, Berta Aparicio-Tejo, Pedro María Aranjuelo, Iker Falleiros Carvalho, Rogério |
| author_sort |
Nascimento Santos, Luiz Cláudio |
| title |
The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| title_short |
The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| title_full |
The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| title_fullStr |
The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| title_full_unstemmed |
The auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| title_sort |
auxin-resistant dgt tomato mutant grows less than the wild type but is less sensitive to ammonium toxicity and nitrogen deficiency |
| publisher |
Elsevier BV |
| publishDate |
2020-09 |
| url |
http://hdl.handle.net/10261/227983 |
| work_keys_str_mv |
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