Chinese Bulletin of Botany ›› 2017, Vol. 52 ›› Issue (3): 278-289.DOI: 10.11983/CBB16195

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Effect of Light and Water Stress on Photochemical Efficiency and Pigment Composition of Sabina vulgaris Seedlings

Jinling Zhang, Da Cheng, Yuling Li*, Haipeng Chen   

  1. Forestry College of Agricultural University of Hebei, Baoding 071000, China
  • Received:2016-10-07 Accepted:2017-01-03 Online:2017-05-01 Published:2017-05-27
  • Contact: Li Yuling
  • About author:

    # Co-first authors

Abstract: We aimed to ascertain the photoinhibition response mechanism of 3-year-old Sabina vulgaris seedlings of Mu Us Sandland in different light and water conditions. We examined the photochemical efficiency of photosystem II at predawn (Fv/Fm) and the content of chlorophyll (Chla+Chlb) and lutein (A+V+Z) of every treatment and analyzed the change law of chlorophyll cycle and xanthophyll cycle. Sabina vulgaris seedlings avoided excess light energy and photodamage and dissipated excess light energy by decreasing the content of chlorophyllb (Chlb) and increasing the ratio of Chla to Chlb (Chla/Chlb ratio), content of A+V+Z and A+Z, (A+V+Z)/(Chla+Chlb) ratio and (A+V)/(A+V+Z) ratio in 77% light transmittance area. The mechanism of chlorophyll cycle and xanthophyll cycle of S. vulgaris seedlings was changed quickly with the change in water condition in 25% light transmittance area. S. vulgaris seedlings captured more light energy by increasing the content of Chlb and decreasing the Chla/Chlb ratio in 10% light transmittance area, with little photoinhibition in this area. S. vulgaris seedlings in Mu Us Sandland can adapt to different light and water conditions and can complete their natural regeneration as a unique community landscape in the harsh desert, which is closely related to chlorophyll cycle and xanthophyll cycle.