Cellular anatomy of tomato stems in response to far-red light 2 31 Moneymaker hypocotyls were two times longer (1.9cm compared to 3.9 cm) in WL+FR treatment compared to WL control (Figure 2.4a). However, unlike hypocotyl elongation, main root length, lateral root length, lateral root number and density did not respond to WL+FR treatment (Figure 2.4). Figure 2.1. Seedling stage of Moneymaker grown on a plate for 10 days. WL WL+FR 0 2 4 6 *** Hypocotyl length(cm) WL WL+FR 0 1 2 3 No of lateral roots/length(cm-1) WL WL+FR 0 10 20 30 40 Lateral root number WL WL+FR 0 5 10 15 20 Primary root length(cm) WL WL+FR 0 2 4 6 Lateral root length (cm) WL WL+FR 0 10 20 30 Total lateral root length(cm) (a) (b) (c) (d) (e) (f) Figure 2.2. Hypocotyl and root traits in WL and WL+FR for tomato cultivar Moneymaker. Two independent biological experiments were conducted (n=15). The data includes measurements of (a) hypocotyl length, (b) primary root length, (c) lateral root length, (d) total lateral root length, (e) lateral root number and (f) lateral root density (e divided by b). Asterisks indicate significance between WL and WL+FR as follows: *** p≤0.001.
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