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Fig. 4 | BMC Plant Biology

Fig. 4

From: Photosynthetic performance and photosynthesis-related gene expression coordinated in a shade-tolerant species Panax notoginseng under nitrogen regimes

Fig. 4

Responses of PSII maximum quantum efficiency (Fv`/Fm`, a), PSII photochemical quantum yield (ΦPSII, b), photochemical quenching (qP, c), non-photochemical quenching (NPQ, d) to photosynthetic photon flux density (PPFD) in Panax notoginseng grown under different levels of nitrogen. Values for each point were means ± SD (n = 7). Significant differences are indicated by asterisks (ANOVA; P values ≤0.05)

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BMC Plant Biology

ISSN: 1471-2229

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