Crosstalk in plant cell signaling: structure and function of the genetic network

Genoud, Thierry; Métraux, Jean‐Pierre

doi:10.1016/s1360-1385(99)01498-3

Cited by 168 publications

(90 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Models describing signal processing and plant development are now shifting from a set of linear and separate transduction pathways to network-level structural formation (Genoud and Metraux, 1999;Gutierrez et al, 2007). GmDof17-1 is a member of the Dof family of transcription factors, which play roles in plant development and growth, and the Dof family requires further characterization, especially with regard to its role in auxin.…”

Section: Discussionmentioning

confidence: 99%

Constitutive overexpression of GmDof17-1, a putative DOF transcription factor from soybean causing growth inhibition in tobacco

Shi

2014

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

The Dof proteins belong to a large family of plant transcription factors that share a single highly conserved zinc fi nger and play an important role in many physiological processes.To elucidate the function of Dof in soybean, GmDof17-1 was cloned from soybean (Glycine max (L.) Merr); the open reading frame (ORF) of GmDof17-1 is 846 bp and encodes a putative protein that includes 281 amino acids. Using qRT-PCR, the expression profi les of GmDof17-1 were obtained for various parts of the soybean plant. GmDof17-1 was primarily expressed in the roots and pods at various stages of pod development. The gene was ectopically expressed in tobacco under the control of the 2 × CaMV35S promoter to study the functions of the gene product.The transgenic tobacco plants showed to be dwarf, and the indole-3-acetic acid (IAA) content was decreased, whereas the sulfur-containing amino acid content of the seeds increased. These results provide new insight into the function of GmDof17-1 in seed development. IntroductionDof proteins are a major family of plant transcription factors that have a strongly conserved DNA-binding domain, which contains a single C 2 C 2 -type zinc-fi ngerlike motif that is generally located in the N-terminal region and a C-terminal domain for transcriptional regulation (this region has divergent amino acid sequences) (Yanagisawa and Izui, 1993;Yanagisawa, 2004). Since Dof1 (the fi rst identifi ed Dof protein) was found in maize (Yanagisawa and Izui, 1993), many Dof proteins have been discovered, which participate in specifi c biological processes in other plants. The functions of reported Dof genes are highly diverse and include roles in hormone response, defense response, organ development and other responses (Baumann et al., 1999;Kang and Singh, 2001; Kang et al., 2000;Kisu et al., 1998;Mena et al., 1998;Plesch et al., 2001;Vicente-Carbajosa et al., 1997;Wang et al., 2007;Ward et al., 2005;Washio, 2001;Xin et al., 2009;Yang et al., 2010).Phytohormones play important roles in coordinating many growth-related processes throughout the plant life cycle, including embryogenesis, vascular differentiation, organogenesis, tropic growth and root and shoot architecture (Kepinski, 2006;Quint and Gray, 2006; Shan et al., 2012 Stamm andKumar, 2010). Some researchers have studied the interactions between Dof proteins and phytohormones and the tobacco Dof protein NtBBF1 has been found to be involved in the auxin-inducible expression of rolB (Baumann et al., 1999).The expression of the pumpkin ascorbate oxidase gene (AOBP), which binds to the AGTA repeat through the Dof domain, is regulated by auxin (Kisu et al., 1998;Esaka et al., 1992). PtDof1 was isolated from Populus tomentosa, which exhibits tissue-specifi c expression (Xin et al., 2009). These studies indicate possible roles for Dof proteins in the auxin response. In Arabidopsis, OBP3 (AtDof3.6) was induced by salicylic acid (Kang et al., 2003), and OBP3 is a component in phytochrome and cryptochrome signaling. OBP3 mutants exhibit a root defect and yel...

show abstract

Section: Discussionmentioning

confidence: 99%

Constitutive overexpression of GmDof17-1, a putative DOF transcription factor from soybean causing growth inhibition in tobacco

Shi

2014

Sci. agric. (Piracicaba, Braz.)

View full text Add to dashboard Cite

show abstract

“…Let us think about the limit of λ → −∞ in the saddle point equation (8). Then, the term (1 − λ)M appearing in the argument of tanh[β(· · ·)] becomes dominant, namely, (1 − λ)M ≫ z √ αr even if the loading rate α is large.…”

Section: Saddle Point Equationsmentioning

confidence: 99%

“…Then, the term (1 − λ)M appearing in the argument of tanh[β(· · ·)] becomes dominant, namely, (1 − λ)M ≫ z √ αr even if the loading rate α is large. Consequently, equation (8) leads to…”

Section: Saddle Point Equationsmentioning

confidence: 99%

Competition between ferro-retrieval and anti-ferro orders in a Hopfield-like network model for plant intelligence

Inoue

Chakrabarti

2005

Physica A: Statistical Mechanics and its Applications

View full text Add to dashboard Cite

We introduce a simple cellular-network model to explain the capacity of the plants as memory devices. Following earlier observations (Bose [1] and others), we regard the plant as a network in which each of the elements (plant cells) are connected via negative (inhibitory) interactions. To investigate the performance of the network, we construct a model following that of Hopfield, whose energy function possesses both Hebbian spin glass and anti-ferromagnetic terms. With the assistance of the replica method, we find that the memory state of the network decreases enormously due to the effect of the anti-ferromagnetic order induced by the inhibitory connections. We conclude that the ability of the plant as a memory device is rather weak.

show abstract

“…Together with drying after priming, low and high temperature, water stress and abscisic acid (ABA) can be used to maintain priming benefits (Lin et al, 2005;Sabehat;Lurie;Weiss, 1998). Drying after priming might work as a cross-tolerance mechanism to activate the seed defense system to subsequent severe stress (Genoud;Metraux, 1999;Kranner et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Cross-Tolerance Mechanism Induction in Melon Seeds by Priming Prior Drying

et al. 2015

View full text Add to dashboard Cite

The loss of benefits after re-drying is one of the drawbacks of the seed priming technique. Different types of stresses have been used before re-drying to preserve the priming benefits. This process may be seen as promoting cross tolerance to increase the defense mechanisms that prevent loss of viability in seeds primed after drying. We tested the effect of some stresses to induce cross-tolerance and different drying conditions with the aim of maintaining priming benefits in melon seeds. The seeds were primed in an aerated KNO 3 solution (0.35M), -1.7MPa, 25 °C, in the dark for six days. The primed seeds were then submitted to slow drying, fast drying, cold shock + slow drying, cold shock + fast drying, heat shock + slow drying, heat shock + fast drying, PEG + slow drying, PEG + fast drying, ABA + slow drying, ABA + fast drying and no drying (planted directly after priming). We evaluated antioxidant enzyme activities (SOD, CAT and APX), germinability, mean time of germination (MTG) and mean rate of germination (MRG). A completely randomized design was used with three repetitions of 50 seeds in each treatment. Data were analyzed by ANOVA and means were compared by the Scott-Knott test (p ≤ 0.05). ABA increased SOD activity after drying and CAT activity was reduced by priming. APX activity was not observed. The stress submission prior to re-drying improved the MRG and reduced MTG. Therefore, the induction of the cross-tolerance mechanism could be effective to maintain priming benefits in melon seeds.Index terms: PEG; priming; dry seeds; antioxidant system. RESUMOA perda dos benefícios do condicionamento, após a ressecagem, é um dos problemas do condicionamento. Para conservar os benefícios, têm sido utilizados diferentes estresses antes da secagem. Esse processo poderia agir como tolerância cruzada, aumentando os mecanismos de defesa, prevenindo a perda de viabilidade em sementes condicionadas após a secagem. Assim, testou-se o efeito de estresses, na tentativa de induzir tolerância cruzada, após diferentes secagens, mantendo os benefícios do condicionamento em sementes de melão. Dessa forma, as sementes foram condicionadas em solução aerada de KNO 3 (0,35M), -1,7 MPa, 25 °C, no escuro, por seis dias. Depois disso, foram submetidas à secagem lenta, rápida, choque de frio + secagem lenta e rápida, choque de calor + secagem lenta e rápida, PEG + secagem lenta e rápida, ABA + secagem lenta e rápida e sementes sem secagem. As sementes não condicionadas foram o controle. Foi avaliada a atividade das enzimas SOD, CAT e APX, germinabilidade, tempo médio de germinação e taxa média de germinação. O delineamento experimental utilizado foi inteiramente casualisado (DIC) com três repetições, contendo 50 sementes para cada tratamento. Para a análise estatística dos dados, foi utilizado ANOVA e as médias comparadas pelo teste de Scott-Knott (p ≤ 0,05). A aplicação de ABA aumentou a atividade da SOD após a secagem e o condicionamento reduziu a atividade da CAT. O estresse inicial, antes da secagem, aumentou-a e reduziu o...

show abstract

Crosstalk in plant cell signaling: structure and function of the genetic network

Cited by 168 publications

References 37 publications

Constitutive overexpression of GmDof17-1, a putative DOF transcription factor from soybean causing growth inhibition in tobacco

Constitutive overexpression of GmDof17-1, a putative DOF transcription factor from soybean causing growth inhibition in tobacco

Competition between ferro-retrieval and anti-ferro orders in a Hopfield-like network model for plant intelligence

Cross-Tolerance Mechanism Induction in Melon Seeds by Priming Prior Drying

Contact Info

Product

Resources

About