Figure 5.
Overexpression and Suppression of PGM48 in Arabidopsis Shows That PGM48 Protein Accelerates Natural Leaf Senescence.
(A) Examples of progression of natural leaf senescence of wild-type, OE, and RNAi lines under 18 h light/6 h dark, 130 µmol photons m−2 s−1 light intensity. Ten individual leaves, numbered from oldest to youngest, were separated from a plant rosette for each of the three genotypes at days 28 and 35.
(B) Percentage of leaf color measured from leaf 1 to 10 for each genotype; the average values of for three rosette plants per genotype are presented. Dark green, healthy looking green tissue; light green, light-green tissue undergoing degreening; yellow, yellow leaf section mostly devoid of visible chlorophyll; brown, dead leaf.
(C) Chlorophyll a + b content on fresh weight bases and total carotenoid/total chlorophyll ratios for leaves 5 and 6 in the three genotypes at 28 d for plants as shown in (A) and (B). Significance levels are indicated: *P < 0.05 and **P < 0.01.