Gibberellic acid in plant

Gupta, R.K.; Chakrabarty, Setu

doi:10.4161/psb.25504

Cited by 300 publications

(130 citation statements)

References 65 publications

(62 reference statements)

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“…The process of seed germination is a critical stage in the plant life cycle and therefore plants have evolved precise mechanisms for its regulation (Debeaujon et al, 2000; Manz et al, 2005; Fait et al, 2006; Finch-Savage and Leubner-Metzger, 2006; Nonogaki et al, 2010; Rajjou et al, 2012). …”

Section: Seed Germination Under the Control Of Aba In The Presence Ofmentioning

confidence: 99%

The Role and Regulation of ABI5 (ABA-Insensitive 5) in Plant Development, Abiotic Stress Responses and Phytohormone Crosstalk

2016

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ABA Insensitive 5 (ABI5) is a basic leucine zipper transcription factor that plays a key role in the regulation of seed germination and early seedling growth in the presence of ABA and abiotic stresses. ABI5 functions in the core ABA signaling, which is composed of PYR/PYL/RCAR receptors, PP2C phosphatases and SnRK2 kinases, through the regulation of the expression of genes that contain the ABSCISIC ACID RESPONSE ELEMENT (ABRE) motif within their promoter region. The regulated targets include stress adaptation genes, e.g., LEA proteins. However, the expression and activation of ABI5 is not only dependent on the core ABA signaling. Many transcription factors such as ABI3, ABI4, MYB7 and WRKYs play either a positive or a negative role in the regulation of ABI5 expression. Additionally, the stability and activity of ABI5 are also regulated by other proteins through post-translational modifications such as phosphorylation, ubiquitination, sumoylation and S-nitrosylation. Moreover, ABI5 also acts as an ABA and other phytohormone signaling integrator. Components of auxin, cytokinin, gibberellic acid, jasmonate and brassinosteroid signaling and metabolism pathways were shown to take part in ABI5 regulation and/or to be regulated by ABI5. Monocot orthologs of AtABI5 have been identified. Although their roles in the molecular and physiological adaptations during abiotic stress have been elucidated, knowledge about their detailed action still remains elusive. Here, we describe the recent advances in understanding the action of ABI5 in early developmental processes and the adaptation of plants to unfavorable environmental conditions. We also focus on ABI5 relation to other phytohormones in the abiotic stress response of plants.

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Section: Seed Germination Under the Control Of Aba In The Presence Ofmentioning

confidence: 99%

The Role and Regulation of ABI5 (ABA-Insensitive 5) in Plant Development, Abiotic Stress Responses and Phytohormone Crosstalk

2016

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“…According to Kucera et al (2005) Gibberellic acid promotes germination being required for embryo cell elongation, for overcoming coat restrictions to germination of non-dormant and dormant seeds, and for inducing endosperm weakening (Gupta & Chakrabarty, 2013).…”

Section: Discussionmentioning

confidence: 99%

Optimizing in vitro germination of Capsicum baccatum L. seeds through a multifactorial experimental design

Fidemann¹,

Nascimento²,

Moraes³

et al. 2016

AIJB

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The Capsicum genus comprises hundreds of varieties with fruits that differ widely in shape, size, color, and flavor. The Brazilian cuisine consumes Capsicum baccatum L. (pepper) extensively and few reports about chemical composition and biological properties about this pepper were published. The present study determined four factors numeric effects on germination in vitro of this specie, among them, the solution type for osmotic conditioning (water and 1% KNO3 aqueous solution), germination medium (agar and agar + gibberellic acid at 1.88 mgL -1 ), post-seeding time (15 and 30 days) and two genotypes (Pitanga and Cambuci) on two germination parameters (germination and cotyledon emerging rates), as first step for establishing a cell suspension culture to produce secondary metabolites. The methodology was a two-level full factorial experimental design (2 4 ). The results allowed polynomial equations definition which describes the germination phenomena as a function of the four factors under study. The genotype responses to osmotic conditioning and germination medium were different. The optimal combination of treatments for in vitro germination and development of seedlings for Pitanga and Cambuci was water + agar and water + agar-GA3, respectively.

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“…4.9 ) and stimulate trigger transitions from the meristem to shoot growth, juvenile to adult leaf stage, and vegetative to fl owering and grain development along with the interaction of different environmental stress factors (Verelst et al 2010 ;Gupta and Chakrabarty 2013 ;. Gibberellic acid plays a key role in seed germination through coordinating interactions with other growth hormones and external signals.…”

Section: Biosynthesis Of Gibberellins and Their Role In Biological Prmentioning

confidence: 99%

Plant Hormones under Challenging Environmental Factors

Ahammed¹,

Yu²

2016

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Gibberellic acid in plant

Cited by 300 publications

References 65 publications

The Role and Regulation of ABI5 (ABA-Insensitive 5) in Plant Development, Abiotic Stress Responses and Phytohormone Crosstalk

The Role and Regulation of ABI5 (ABA-Insensitive 5) in Plant Development, Abiotic Stress Responses and Phytohormone Crosstalk

Optimizing in vitro germination of Capsicum baccatum L. seeds through a multifactorial experimental design

Plant Hormones under Challenging Environmental Factors

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