Tagged: Corner’s rule

Path analysis of relationship between meristem summary variables, nuclear genome size and plant traits.

Shoot apical meristem and plant body organization: a cross-species comparative study

The shoot apical meristem (SAM) is the key organizing element of the plant body. Surprisingly, there are almost no across-species comparative data showing links between the SAM and whole-plant traits such as leaf size, stem diameter or seed mass. Schnablová et al. show that such relationships do exist, and moreover, that as a result of recent convergent evolution species differ in their SAM cell number, which is correlated with a number of plant traits. This study suggests that SAM indeed provides a strong link informing traits of plant organs, and is a key component of plant’s evolutionary response to the...

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Small and large twigs

Revising Corner’s rule: how to best partition twig leaf area

Corner’s rule states that in woody plants, twigs (current-year shoots) with thicker stems support larger leaves. Larger leaf areas require thicker twigs for hydraulic and mechanical support, but a question remains as to why the pattern of thicker twigs resulting in larger leaves emerges, and also as to whether total leaf area should be partitioned into many small leaves or a few large leaves. Corner’s rule implies that larger twig leaf areas should be partitioned into larger sized leaves. Smith et al. verified Corner’s rule in six co-occurring and functionally similar species, finding that individual increases in leaf size correlate...

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