Respostas fisiológicas ao déficit hídrico em duas cultivares enxertadas de seringueira ("RRIM 600" e "GT 1") crescidas em campo

Conforto, Elenice de Cássia

doi:10.1590/s0103-84782008000300013

“…In this work, we identified many genes involved in the response to drought, showing the importance of this element for the development of rubber trees, as already reported by Conforto (2008). Conson et al (2018) and Souza et al (2019) showed that the environments in which the populations used in this work are grown are environments with constant water deficit, which was expected because they are escape areas, which presents different climate of their natural habitat but where the rubber tree has adapted well .…”

Section: Discussionsupporting

confidence: 77%

Unravelling Rubber Tree Growth by Integrating GWAS and Biological Network-Based Approaches

Fr

¹

,

Aono

²

,

Silva

³

et al. 2021

Preprint

2

0

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Hevea brasiliensis (rubber tree) is a large tree species of the Euphorbiaceae family with inestimable economic importance. Rubber tree breeding programs currently aim to improve growth and production, and the use of early genotype selection technologies can accelerate such processes, mainly with the incorporation of genomic tools, such as marker-assisted selection (MAS). However, few quantitative trait loci (QTLs) have been used successfully in MAS for complex characteristics. Recent research shows the efficiency of genome-wide association studies (GWAS) for locating QTL regions in different populations. In this way, the integration of GWAS, RNA-sequencing (RNA-Seq) methodologies, coexpression networks and enzyme networks can provide a better understanding of the molecular relationships involved in the definition of the phenotypes of interest, supplying research support for the development of appropriate genomic based strategies for breeding. In this context, this work presents the potential of using combined multiomics to decipher the mechanisms of genotype and phenotype associations involved in the growth of rubber trees. Using GWAS from a genotyping-by-sequencing (GBS) Hevea population, we were able to identify molecular markers in QTL regions with a main effect on rubber tree plant growth under constant water stress. The underlying genes were evaluated and incorporated into a gene coexpression network modelled with an assembled RNA-Seq-based transcriptome of the species, where novel gene relationships were estimated and evaluated through in silico methodologies, including an estimated enzymatic network. From all these analyses, we were able to estimate not only the main genes involved in defining the phenotype but also the interactions between a core of genes related to rubber tree growth at the transcriptional and translational levels. This work was the first to integrate multiomics analysis into the in-depth investigation of rubber tree plant growth, producing useful data for future genetic studies in the species and enhancing the efficiency of the species improvement programs.

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“…In this work, we identified many genes involved in the response to drought, showing the importance of this element for the development of rubber trees, as already reported by Conforto (2008). Conson et al (2018) and Souza et al (2019) showed that the environments in which the populations used in this work are grown are environments with constant water deficit, which was expected because they are escape areas, which presents different climate of their natural habitat but where the rubber tree has adapted well.…”

Section: Multiomicssupporting

confidence: 76%

Unravelling Rubber Tree Growth by Integrating GWAS and Biological Network-Based Approaches

Francisco

¹

,

Aono

²

,

Silva

³

et al. 2021

View full text Add to dashboard Cite

Hevea brasiliensis (rubber tree) is a large tree species of the Euphorbiaceae family with inestimable economic importance. Rubber tree breeding programs currently aim to improve growth and production, and the use of early genotype selection technologies can accelerate such processes, mainly with the incorporation of genomic tools, such as marker-assisted selection (MAS). However, few quantitative trait loci (QTLs) have been used successfully in MAS for complex characteristics. Recent research shows the efficiency of genome-wide association studies (GWAS) for locating QTL regions in different populations. In this way, the integration of GWAS, RNA-sequencing (RNA-Seq) methodologies, coexpression networks and enzyme networks can provide a better understanding of the molecular relationships involved in the definition of the phenotypes of interest, supplying research support for the development of appropriate genomic based strategies for breeding. In this context, this work presents the potential of using combined multiomics to decipher the mechanisms of genotype and phenotype associations involved in the growth of rubber trees. Using GWAS from a genotyping-by-sequencing (GBS) Hevea population, we were able to identify molecular markers in QTL regions with a main effect on rubber tree plant growth under constant water stress. The underlying genes were evaluated and incorporated into a gene coexpression network modelled with an assembled RNA-Seq-based transcriptome of the species, where novel gene relationships were estimated and evaluated through in silico methodologies, including an estimated enzymatic network. From all these analyses, we were able to estimate not only the main genes involved in defining the phenotype but also the interactions between a core of genes related to rubber tree growth at the transcriptional and translational levels. This work was the first to integrate multiomics analysis into the in-depth investigation of rubber tree plant growth, producing useful data for future genetic studies in the species and enhancing the efficiency of the species improvement programs.

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“…O retardo por sua vez, está relacionado com a manutenção do turgor e volume celular, ocasionados pelo desenvolvimento de um eficiente sistema radicular para absorção de água e pela diminuição da perda de água para atmosfera, que é decorrente do aumento do espessamento das paredes celulares e da cerosidade da cutícula. Por fim, a tolerância está associada à capacidade da planta em manter suas funções fisiológicas mesmo em condições de déficit hídrico (Conforto 2008).…”

Section: Mecanismos De Adaptação Tolerância E Aclimatação Das Plantas Forrageiras Ao Estresse Hídricounclassified

“…As plantas podem ainda adaptar-se à seca por meio da produção de folhas menores e abscisão foliar (Cavalcante et al, 2009). Outro mecanismo fisiológico de proteção á desidratação imediata é o fechamento estomático, que reduz a perda de água das folhas pelo processo de transpiração (Conforto 2008;Taiz & Zeiger 2009). Ao avaliar três genótipos de capim elefante anão, submetidos a duas condições de disponibilidade hídrica, Araújo et al, (2010) observaram uma redução da condutância estomática e, consequente, diminuição da transpiração nas plantas não irrigadas (Figura 3A e 3B), indicando que o estresse hídrico causado por déficit, causou o fechamento estomático e reduziu a perda de água pela planta.…”

Section: Mecanismos De Adaptação Tolerância E Aclimatação Das Plantas Forrageiras Ao Estresse Hídricounclassified

Estrés hídrico en plantas forrajeras: Una revisión

Júnior

¹

,

Gomes

²

,

Silva

³

et al. 2019

Pubvet

10

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A água é um dos recursos determinante para o funcionamento e crescimento pleno das plantas, ao mesmo tempo em que é considerado o mais limitante. Nesse sentido, um dos principais fatores causador de estresse nas plantas é a disponibilidade hídrica. O conhecimento do desempenho das plantas forrageiras em condições de estresse hídrico é de grande valia para entendimento do efeito do período "seco" na produção de forragem, permitindo assim o uso de práticas de manejo viáveis para melhorar o cultivo durante esse período. Desta forma, objetivou-se com esta revisão discorrer sobre as respostas das plantas forrageiras submetidas ao estresse hídrico, destacando os efeitos causados e mecanismos de adaptação dessas plantas, assim como práticas para a convivência com o déficit hídrico.

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Respostas fisiológicas ao déficit hídrico em duas cultivares enxertadas de seringueira ("RRIM 600" e "GT 1") crescidas em campo

Cited by 3 publications

References 12 publications

Unravelling Rubber Tree Growth by Integrating GWAS and Biological Network-Based Approaches

Unravelling Rubber Tree Growth by Integrating GWAS and Biological Network-Based Approaches

Unravelling Rubber Tree Growth by Integrating GWAS and Biological Network-Based Approaches

Estrés hídrico en plantas forrajeras: Una revisión

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