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Review
. 2021 Aug 21;10(8):1732.
doi: 10.3390/plants10081732.

Auxin and Cytokinin Interplay during Leaf Morphogenesis and Phyllotaxy

Sajid Hussain  1   2   3 , Satyabrata Nanda  2   4 , Junhua Zhang  2 , Muhammad Ishaq Asif Rehmani  5 , Muhammad Suleman  3 , Gaojie Li  1 , Hongwei Hou  1
Affiliations
Review

Auxin and Cytokinin Interplay during Leaf Morphogenesis and Phyllotaxy

Sajid Hussain et al. Plants (Basel). .

Abstract

Auxins (IAA) and cytokinins (CKs) are the most influential phytohormones, having multifaceted roles in plants. They are key regulators of plant growth and developmental processes. Additionally, their interplay exerts tight control on plant development and differentiation. Although several reviews have been published detailing the auxin-cytokinin interplay in controlling root growth and differentiation, their roles in the shoot, particularly in leaf morphogenesis are largely unexplored. Recent reports have provided new insights on the roles of these two hormones and their interplay on leaf growth and development. In this review, we focus on the effect of auxins, CKs, and their interactions in regulating leaf morphogenesis. Additionally, the regulatory effects of the auxins and CKs interplay on the phyllotaxy of plants are discussed.

Keywords: leaf arrangement; leaf formation; phytohormonal crosstalk; plant development.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
A schematic diagram depicting the biosynthesis, transport, and signaling of auxin and cytokinin in plants. Solid lines represent the established regulatory connections, whereas the dashed line indicates the possible connection. Line ending with a crossed line indicates the negative regulations.
Figure 2
Figure 2
A model detailing the auxin and cytokinin interplay during leaf development and morphogenesis. Solid lines represent the established regulatory connections, whereas the dashed line indicates the possible connection. Line ending with a crossed line indicates the negative regulations.
See this image and copyright information in PMC

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