Cytokinin Inhibits Lateral Root Development at the Earliest Stages of Lateral Root Primordium Initiation in Maize Primary Root

Márquez, Gonzalo Javier; Alarcón, María Victoria; Salguero, Julio

doi:10.1007/s00344-018-9811-1

Cited by 32 publications

(33 citation statements)

References 33 publications

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“…CKs represses lateral root initiation and promote lateral root elongation [153][154][155]. They block cell cycling in the pericycle founder cells at the G2/M transition phase [156] and then disturb lateral root initiation in plants [157], confirming that the earliest stages of lateral root formation are very sensitive to the inhibitory effect of CKs [158]. Cytokinin Response Factor2 (CRF2), a component of the CK signaling pathway, plays an important role in regulating Arabidopsis lateral root initiation [159].…”

Section: Lateral Root Growthmentioning

confidence: 99%

Convergence and Divergence of Sugar and Cytokinin Signaling in Plant Development

Wang

Gourrierec

Jiao

et al. 2021

IJMS

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Plants adjust their growth and development through a sophisticated regulatory system integrating endogenous and exogenous cues. Many of them rely on intricate crosstalk between nutrients and hormones, an effective way of coupling nutritional and developmental information and ensuring plant survival. Sugars in their different forms such as sucrose, glucose, fructose and trehalose-6-P and the hormone family of cytokinins (CKs) are major regulators of the shoot and root functioning throughout the plant life cycle. While their individual roles have been extensively investigated, their combined effects have unexpectedly received little attention, resulting in many gaps in current knowledge. The present review provides an overview of the relationship between sugars and CKs signaling in the main developmental transition during the plant lifecycle, including seed development, germination, seedling establishment, root and shoot branching, leaf senescence, and flowering. These new insights highlight the diversity and the complexity of the crosstalk between sugars and CKs and raise several questions that will open onto further investigations of these regulation networks orchestrating plant growth and development.

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Section: Lateral Root Growthmentioning

confidence: 99%

Convergence and Divergence of Sugar and Cytokinin Signaling in Plant Development

Wang

Gourrierec

Jiao

et al. 2021

IJMS

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“…External application of CK or increased CK signalling by mutants (higher order type-A ARR) shows negative regulation of PR length both in monocots and dicots [ 4 , 58 , 59 , 60 , 61 , 62 , 63 ]. The negative role of CK in root growth is also supported by CK deficient mutants, where the PR grows faster [ 58 ].…”

Section: Impact Of Hormones In the Regulation Of Different Aspects Of Rsamentioning

confidence: 99%

“…Although the optimization of LR development is primarily governed by auxin, various studies highlight the role of CKs in LR patterning and growth [ 60 , 63 , 112 ]. Previous reports demonstrate that change in the CK levels, either through increased endogenous signalling or through external application, inhibits LR production [ 113 , 114 ].…”

Section: Impact Of Hormones In the Regulation Of Different Aspects Of Rsamentioning

confidence: 99%

“…A recent report claims that the impact of CK on LR elongation is tissue- and concentration-specific as low CK levels reduced the length of the laterals in the apical/proximal region of the root system. By contrast, high levels of CK reduced the length along the entire root system, but with a more pronounced effect in the apical zones [ 63 ]. Another interesting report introduces TRANSPORTER OF IBA1 (TOB1), as a new player in LR development.…”

Section: Impact Of Hormones In the Regulation Of Different Aspects Of Rsamentioning

confidence: 99%

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Understanding the Intricate Web of Phytohormone Signalling in Modulating Root System Architecture

Sharma

Singh

Saksena

et al. 2021

IJMS

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Root system architecture (RSA) is an important developmental and agronomic trait that is regulated by various physical factors such as nutrients, water, microbes, gravity, and soil compaction as well as hormone-mediated pathways. Phytohormones act as internal mediators between soil and RSA to influence various events of root development, starting from organogenesis to the formation of higher order lateral roots (LRs) through diverse mechanisms. Apart from interaction with the external cues, root development also relies on the complex web of interaction among phytohormones to exhibit synergistic or antagonistic effects to improve crop performance. However, there are considerable gaps in understanding the interaction of these hormonal networks during various aspects of root development. In this review, we elucidate the role of different hormones to modulate a common phenotypic output, such as RSA in Arabidopsis and crop plants, and discuss future perspectives to channel vast information on root development to modulate RSA components.

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“…Active KIT consist of an adenine (Ade) moiety with an N6-substituted isoprene chain, isoprene derivative, or an aromatic ring [ 95 , 151 ]. Cytokinins inhibit LR formation, influence the root architecture, and seem to antagonize auxin action in the root meristem by promoting cell differentiation along the primary root axis [ 152 ].…”

Section: Maize ( Zea Mays L)mentioning

confidence: 99%

Primary Root and Mesocotyl Elongation in Maize Seedlings: Two Organs with Antagonistic Growth below the Soil Surface

Rodríguez

Cassab

2021

Plants

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Maize illustrates one of the most complex cases of embryogenesis in higher plants that results in the development of early embryo with distinctive organs such as the mesocotyl, seminal and primary roots, coleoptile, and plumule. After seed germination, the elongation of root and mesocotyl follows opposite directions in response to specific tropisms (positive and negative gravitropism and hydrotropism). Tropisms represent the differential growth of an organ directed toward several stimuli. Although the life cycle of roots and mesocotyl takes place in darkness, their growth and functions are controlled by different mechanisms. Roots ramify through the soil following the direction of the gravity vector, spreading their tips into new territories looking for water; when water availability is low, the root hydrotropic response is triggered toward the zone with higher moisture. Nonetheless, there is a high range of hydrotropic curvatures (angles) in maize. The processes that control root hydrotropism and mesocotyl elongation remain unclear; however, they are influenced by genetic and environmental cues to guide their growth for optimizing early seedling vigor. Roots and mesocotyls are crucial for the establishment, growth, and development of the plant since both help to forage water in the soil. Mesocotyl elongation is associated with an ancient agriculture practice known as deep planting. This tradition takes advantage of residual soil humidity and continues to be used in semiarid regions of Mexico and USA. Due to the genetic diversity of maize, some lines have developed long mesocotyls capable of deep planting while others are unable to do it. Hence, the genetic and phenetic interaction of maize lines with a robust hydrotropic response and higher mesocotyl elongation in response to water scarcity in time of global heating might be used for developing more resilient maize plants.

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Cytokinin Inhibits Lateral Root Development at the Earliest Stages of Lateral Root Primordium Initiation in Maize Primary Root

Cited by 32 publications

References 33 publications

Convergence and Divergence of Sugar and Cytokinin Signaling in Plant Development

Convergence and Divergence of Sugar and Cytokinin Signaling in Plant Development

Understanding the Intricate Web of Phytohormone Signalling in Modulating Root System Architecture

Primary Root and Mesocotyl Elongation in Maize Seedlings: Two Organs with Antagonistic Growth below the Soil Surface

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