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🚀 Botany frontiers — 2026

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What plant scientists are working on now. Each card states the open question, the evidence so far and the methods used — not results that have not happened yet.

  • C₄ rice

    Open question: Can rice be re-engineered to use C₄ photosynthesis like maize, raising yield with less water and nitrogen?

    Where it stands: International consortium since 2008; key C₄ genes and parts of the leaf anatomy have been introduced into rice, but a working C₄ cycle has not yet been achieved.

    Builds on: Hatch–Slack C₄ pathway (1966).

    Synthetic biologyLeaf anatomyGene stacking

  • Root microbiome

    Open question: Which soil microbes help roots take up nutrients or resist disease, and can we design that community?

    Where it stands: Microbial inoculants are sold, but their field effects vary; research maps root–microbe signalling.

    Builds on: Mycorrhizal partnerships and strigolactone signalling.

    MetagenomicsSynthetic communitiesField trials

  • Gene-edited crops

    Open question: How fast can CRISPR deliver hardier, more nutritious crops — and how should they be regulated?

    Where it stands: Edited crops are on sale (e.g. high-GABA tomato in Japan, 2021). Several countries now regulate simple edits more lightly than GMOs.

    Builds on: CRISPR in plants (2013).

    CRISPR base & prime editingRegulation

  • Heat & drought

    Open question: How do plants sense heat and drought, and can crops be bred to keep yields in a warmer climate?

    Where it stands: Heat sensors (e.g. phytochrome B acting as a thermosensor, 2016) found; breeding uses these genes.

    Builds on: Plant hormone and light-signalling research.

    Phenotyping dronesGenomicsSpeed breeding

  • Plant communication

    Open question: Do plants warn each other — through airborne chemicals or fungal networks?

    Where it stands: Airborne signals between plants are well supported. Claims of a ‘wood-wide web’ sharing resources between trees are now disputed (review: Karst et al., 2023).

    Builds on: Mycorrhizal networks.

    Isotope tracingVolatile chemistry

  • Nitrogen-fixing cereals

    Open question: Can wheat or maize fix their own nitrogen like beans, cutting fertiliser use?

    Where it stands: Engineered microbes that fix nitrogen near cereal roots are being trialled; transferring nodule-forming ability is a longer-term goal.

    Builds on: Legume–rhizobia symbiosis.

    Synthetic biologySymbiosis genetics