bleached Developing seedling or plant leaf blade tissue becomes chlorotic whiter then necrotic in irregular or diurnal patches depending on light temperature and water conditions. Under favorable conditions these patches may partially recover to a pale green.
MaizeGDB reference

bleached Mature leaf of a blh*-N495B, F2, bleached necrotic mutant plant (right) showing bleaching and necrosis along midveins arranged in diurnal crossbands and along the midrib