GhTTLL12 Coordinates With Transcriptional Regulators GhMML3 and GhMYB86 to Orchestrate Cotton Fibre Development Through Modulating Microtubule Dynamics.
Ma X, Huang X, Li J, Zhao T, Ling Z
Crop Improvement
Cotton's softness comes down to the length of individual cells — and this discovery gives breeders a molecular dial to turn up fiber quality without guesswork.
Cotton fibers are actually single cells that grow incredibly long from the surface of a cotton seed. Researchers found a protein that helps these cells build the internal 'scaffolding' they need to stretch out, and two other proteins act like an on/off switch for it. By turning this protein up or down using gene editing, they could make fibers longer or shorter — which means we may soon be able to grow cotton that's naturally softer or stronger.
Key Findings
Overexpressing GhTTLL12 increased fiber length and the number of fiber cell protrusions in cotton plants, while CRISPR knockout had the opposite effect and significantly reduced fiber quality.
GhTTLL12 physically binds to microtubules and promotes their assembly into ordered transverse arrays, the internal scaffolding fibers need to elongate directionally.
A three-protein regulatory module (GhMML3 activates GhTTLL12; GhMYB86 represses it) links stage-specific gene expression to microtubule remodeling during fiber development.
chevron_right Technical Summary
Scientists discovered a protein called GhTTLL12 that acts as a master switch for cotton fiber growth, working with two other molecular regulators to control when and how fibers elongate. This finding reveals a precise genetic circuit that could be targeted to breed cotton plants with longer, stronger fibers.
Abstract Preview
Microtubules (MTs) are crucial for cell division, growth, development and morphogenesis in plants. Cotton fibres are single-celled trichomes that originate from the epidermal cells of the ovule, ma...
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