The Diverse Roles of Auxin in Regulating Leaf Development

Xiong, Yuanyuan; Jiao, Yuling

doi:10.3390/plants8070243

Cited by 65 publications

(72 citation statements)

References 115 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Leaf development is a genetically regulated process involving sophisticated cooperation of several genetic factors working in a single or multiple pathways (Xiong & Jiao, 2019). The chloroplast is a key cellular organelle responsible for food production for plants via photosynthesis.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

DPS1 regulates cuticle development and leaf senescence in rice

Zafar

Uzair

Khan³

et al. 2021

Food and Energy Security

View full text Add to dashboard Cite

Leaves are the primary food‐producing organs for a plant that carry out photosynthesis and contribute to biomass and grain yield. Leaf senescence is a developmentally regulated physiological process but early leaf senescence is known to negatively affect plant yield. The cuticle is an outer waxy protective layer on the leaf surface which protects plants from pathogens attack as well as dehydration. Our understanding of the molecular mechanisms underlying cuticle development and leaf senescence is still immature. The present study reports the role of the DEGENERATED PANICLE AND PARTIAL STERILITY 1 (DPS1) gene encoding a cystathionine β‐synthase (CBS) domain‐containing protein in cuticle development and leaf senescence in rice. The dps1 loss‐of‐function mutant showed leaf senescence phenotype with twisted leaves, significantly reduced chlorophyll content and degenerated chloroplasts characterized by a reduced number of starch granules and an abundance of osmiophilic bodies. Furthermore, dps1 leaves displayed defective cuticle development, reduced wax and cutin compounds, and lower relative water content as compared with wild type. Physiological assays showed significantly higher accumulation of reactive oxygen species (ROS) accompanied by enhanced DNA fragmentation in dps1 leaves, which could be associated with chloroplast degeneration and defective cuticle development. Transcriptome analysis revealed altered expression of several critical genes related to photosynthesis and wax/cutin pathway. This study revealed a crucial role of DPS1 in regulating leaf cuticle development and senescence by affecting the expression of several genes. Thus, a moderate expression of DPS1 is necessary for better plant growth and productivity.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Leaf shape is an important determinant of plant architecture and also affects the rate of photosynthesis (Xiong & Jiao, 2019). Leaves maintain their proper form due to the turgidity of cells by upholding the cellular water potential.…”

Section: Introductionmentioning

confidence: 99%

DPS1 regulates cuticle development and leaf senescence in rice

Zafar

Uzair

Khan³

et al. 2021

Food and Energy Security

View full text Add to dashboard Cite

show abstract

“…Senescence is the last stage of leaf morphogenesis that involves many distinctive actions [ 103 , 269 ]. In Arabidopsis , miR164 and miR319 modulate aging-induced cell death and leaf senescence.…”

Section: Developmental Functions Of Micrornasmentioning

confidence: 99%

“…In Arabidopsis , the pin1 mutant blocked the floral primordium formation, and in tomato shoot apices treated with polar auxin transport inhibitor, such as N-1-naphthylphthalamic acid (NPA), abolished leaf formation [ 101 , 102 ]. The external application of auxin restored primordium formation in the NPA-inhibitor and pin1 mutant, which indicates the importance of auxin in organ initiation [ 103 ]. In the peripheral of the meristems, organ primordia are separated and form a groove at the base that contains small slow-dividing and slow-expanding cells called the boundary domain [ 19 , 104 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular and Hormonal Regulation of Leaf Morphogenesis in Arabidopsis

Ali

Khan

Xie

2020

IJMS

View full text Add to dashboard Cite

Shoot apical meristems (SAM) are tissues that function as a site of continuous organogenesis, which indicates that a small pool of pluripotent stem cells replenishes into lateral organs. The coordination of intercellular and intracellular networks is essential for maintaining SAM structure and size and also leads to patterning and formation of lateral organs. Leaves initiate from the flanks of SAM and then develop into a flattened structure with variable sizes and forms. This process is mainly regulated by the transcriptional regulators and mechanical properties that modulate leaf development. Leaf initiation along with proper orientation is necessary for photosynthesis and thus vital for plant survival. Leaf development is controlled by different components such as hormones, transcription factors, miRNAs, small peptides, and epigenetic marks. Moreover, the adaxial/abaxial cell fate, lamina growth, and shape of margins are determined by certain regulatory mechanisms. The over-expression and repression of various factors responsible for leaf initiation, development, and shape have been previously studied in several mutants. However, in this review, we collectively discuss how these factors modulate leaf development in the context of leaf initiation, polarity establishment, leaf flattening and shape.

show abstract

“…The formation of distinct leaflets involves the definition of regions of leaflet initiation and blade growth, alongside intercalary and boundary domains in which growth is inhibited (Fig1a and(Ben-Gera et al, 2012, 2016;Bilsborough et al, 2011;Blein et al, 2008;Fleming, 2006;Koenig et al, 2009;Vlad et al, 2014)). The plant hormone auxin plays a central role in this patterning mechanism, together with transcription factors such as the CUP-SHAPED COTYLEDONS (CUC) family, which interact with auxin in the domain specification process (Ben-Gera et al, 2012;Bilsborough et al, 2011;Blein et al, 2008;Kierzkowski et al, 2019;Xiong et al, 2019). In tomato, the Auxin Response Factor (ARF) SlMP/SlARF5 was recently shown acts downstream to auxin to promote leaflet initiation and growth together with additional class A ARF proteins.…”

Section: Introductionmentioning

confidence: 99%

Collaboration of multiple pathways in making a compound leaf

Israeli

Ben-Herzel

Burko

et al. 2020

Preprint

View full text Add to dashboard Cite

The variability in leaf form in nature is immense. Leaf patterning occurs by differential growth that occurs during a limited window of morphogenetic activity at the leaf marginal meristem. While many regulators have been implicated in the designation of the morphogenetic window and in leaf patterning, how these effectors interact to generate a particular form is still not well understood. We addressed the interaction among different effectors of tomato compound leaf development, using genetic and molecular analyses. Mutations in the tomato auxin response factor SlARF5/SlMP, which promotes leaflet formation, suppressed the increased leaf complexity of mutants with extended morphogenetic window. Impaired activity of the NAC/CUC transcription factor GOBLET (GOB), which specifies leaflet boundaries, also reduced leaf complexity in these backgrounds. Analysis of genetic interactions showed that the patterning factors SlMP, GOB and the MYB transcription factor LYRATE (LYR) act in parallel to promote leaflet formation. This work places an array of developmental regulators in a morphogenetic context. It reveals how organ-level differentiation rate and local growth are coordinated to sculpture an organ. These concepts and findings are applicable to other plant species and developmental processes that are regulated by patterning and differentiation.

show abstract

The Diverse Roles of Auxin in Regulating Leaf Development

Cited by 65 publications

References 115 publications

DPS1 regulates cuticle development and leaf senescence in rice

DPS1 regulates cuticle development and leaf senescence in rice

Molecular and Hormonal Regulation of Leaf Morphogenesis in Arabidopsis

Collaboration of multiple pathways in making a compound leaf

Contact Info

Product

Resources

About