Looking at medieval drawings, Paris et al. discover that citron watermelons were more common in Mediterranean Europe in the past than they are presently.
Under drought stress, cross-pollination early in floral lifespan of Collinsia reduces floral longevity, but excess soil moisture does not extend longevity.
Genetically modifying barley and wheat to express the barley gene HvAACT1 gene has potential to alleviate the effects of aluminium toxicity in acid soils.