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Effects of supplemental light on tomato growth and the mechanism of the photosystem II apparatus. | LitMetric

AI Article Synopsis

  • Supplemental light (SL) can help improve plant growth and fruit quality despite high energy consumption, although the underlying processes in photosystem II (PSII) are not fully understood.
  • Research shows that while SL boosts chlorophyll content and enhances photosynthetic parameters, its benefits peak early in the leaf life cycle.
  • Ultimately, an energy-efficient SL approach promotes faster leaf aging and earlier fruit ripening while influencing yield and quality.

Article Abstract

The addition of supplemental light (SL) is an effective way to offset insufficient lighting. Although it is commonly believed that SL increases leaf photosynthesis and therefore improves yield and fruit flavor, the mechanism underlying the effects of SL on the photosystem II (PSII) apparatus remains unclear, and SL leads to high energy consumption. In order to save energy, we investigated the physiological status of the PSII apparatus, plant growth parameters and fruit parameters under two types of overhead SL with a low daily energy consumption of 0.0918 kWh m-2. The results showed that SL significantly increased the leaf chlorophyll content from full unfolding to yellowing. However, a remarkable increase in the absorption flux per cross-section (ABS/CS), the quantum yield of electron transport (φEo) and the performance index (PIabs) was observed only in a relatively short period of the leaf life cycle. SL also enhanced the fruit yield and quality. The obviously increased ΔVK and ΔVJ components of the chlorophyll fluorescence induction kinetic (OJIP) curve, along with the significantly decreased PIabs from days 40-60 after unfolding in the SL-treated groups, resulted in more rapid leaf aging and earlier fruit ripening compared with the control plants (CK). Therefore, an energy-friendly SL strategy can alter the physiological status of the PSII apparatus, affecting yield and fruit quality and maturity.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9070911PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0267989PLOS

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