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| Zsögön,Agustin; Lambais,Marcio Rodrigues; Benedito,Vagner Augusto; Figueira,Antonio Vargas de Oliveira; Peres,Lázaro Eustáquio Pereira. |
| Plant hormones are likely key regulators of arbuscular mycorrhizae (AM) development. However, their roles in AM are not well known. Here mutants in five hormone classes introgressed in a single tomato (Lycopersicon esculentum Mill. Syn Solanum lycopersicum L.) background (cv. Micro-Tom) were used to determine their effects on AM development and the expression of defense-related genes (chitinases and b-1,3-glucanases) in roots. Under low P conditions, mutant epinastic (epi) and Never ripe (Nr), ethylene overproducer and low sensitivity, respectively, had the intraradical colonization by Glomus clarum highly inhibited, as compared to the control Micro-Tom (MT). No significant alterations in fungal colonization were observed in mutants affecting other hormone... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon; Micro-Tom; Defense-related genes; Hormones; Phosphate. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000300006 |
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| Pompeu,Georgia Bertoni; Ambrosano,Guilherme Bovi; Vilhena,Milca Bartz; Carvalho,Rogério Falleiros; Gratão,Priscila Lupino; Andrino,Felipe; Lira,Simone Possedente de; Azevedo,Ricardo Antunes. |
| ABSTRACT Uptake of nutrients and cadmium (Cd) are dependent upon many factors, including plant species, ions concentration and pH. Tolerance to Cd-induced oxidative stress can be modulated by phytohormones such as abscisic acid (ABA), which induce the production of reactive oxygen species, activating proteins and enzymes involved in stress response and possibly stress tolerance. The present study aimed to evaluate the biochemical variations induced by Cd in ABA-deficient sitiens tomato mutant (sit) and its wild-type counterpart, Micro-Tom (MT), grown at different pH conditions. The plants were cultivated in nutrient solution (pH 5, 6 and 7; 20-days) and were then further grown over a 48-h period in 0 or 50 ?M CdCl2 at pH 6. Before Cd addition, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant enzymes; Micro-Tom; Mineral nutrition; Oxidative stress; Solanum lycopersicum. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300317 |
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| Melo,Hyrandir Cabral de; Castro,Evaristo Mauro de; Soares,Ângela Maria; Oliveira,Cynthia de; Ramos,Sílvio Júnio. |
| Objetivou-se, neste trabalho, caracterizar aspectos fisiológicos de microtomateiros (Lycopersicon esculentum P. Miller cv. Micro-Tom) fitocromo-mutantes. A cultivar Micro-Tom e os mutantes aurea (deficiente na biossíntese do cromóforo dos fitocromos), atroviolacea (atv) e high pigment1 (hp1;ambos superexpressam eventos mediados por fitocromos) foram cultivados em condições controladas de luz e temperatura e caracterizados no estágio de floração. O mutante hp1 obteve as maiores taxas de fotossíntese potencial e de conteúdo de carotenóides. O mutante aurea manteve taxas de fotossíntese potencial similares à cultivar Micro-Tom, mesmo expressando o mais baixo conteúdo de clorofilas, e também expressou o maior conteúdo de nitrogênio entre os demais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Micro-Tom; Pigmentos fotossintéticos; Fotossíntese. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000500003 |
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