Effects of LED red and blue light quality on the growth and photosynthetic characteristics of Philodendron 'con-go' hydroponic seedlings

Le résumé fourni par la source

Philodendron 'con-go' was used to study the effects of different red-to-blue light ratios on its physiological indices. Six light treatments were applied: Fluorescent Daylight Lamp (CK), and RB (100% Blue, 60% R + 40% B, 70% R + 30% B, 80% R + 20% B, 100% Red) via LEDs. Results showed both red and blue light benefited Philodendron 'con-go' growth. Red light aided underground dry matter accumulation and photosynthetic pigment buildup, while blue light helped aboveground dry matter accumulation and root activity enhancement. Under the 6:4 treatment, Philodendron 'con-go' displayed better morphological parameters, chlorophyll content, photosynthetic parameters, and antioxidant enzyme activity. The 6:4 group's chlorophyll a, b, and carotenoids were 43.79%, 154.76%, and 112.28% higher than CK. In chlorophyll fluorescence parameters, the 6:4 group had 72.73% and 83.33% higher ΦPSII and qP, and 21.33% lower NPQ than CK. The optimal treatment increased Pn by 32.35% and E by 40% compared to CK. For antioxidant enzyme activity, the 6:4 group's SOD was 67.17% higher than CK. Overall, the 6:4 treatment is a suitable indoor light environment and is recommended for Philodendron production and application.

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