Welcome to visit Scientia Silvae Sinicae,Today is

Scientia Silvae Sinicae ›› 2019, Vol. 55 ›› Issue (12): 21-31.doi: 10.11707/j.1001-7488.20191203

• Articles • Previous Articles     Next Articles

Effects of Photosynthetic Pigment Content on Photosynthetic Characteristics of Different Leaf Color Phenotypes of Sinobambusa tootsik f. luteoloalbostriata

Lingyan Chen1,Dejin Xie2,Jundong Rong2,Jinli Lai1,Xueling Lin1,Yushan Zheng1,*   

  1. 1. College of Landscape Architecture, Fujian Agriculture and Forestry University Fuzhou 350002
    2. College of Forestry, Fujian Agriculture and Forestry University Fuzhou 350002
  • Received:2018-08-19 Online:2019-12-25 Published:2020-01-02
  • Contact: Yushan Zheng
  • Supported by:
    福建省自然科学基金项目(2019J01663);福建省中青年教师教育科学研究项目(JAT170197);福建省科技重大专项(2013NZ0001);福建农林大学科技创新专项基金项目(CXZX2016099)

Abstract:

Objectve: Sinobambusa tootsik f. luteoloalbostriata is a bamboo species with creeping rhizomes, various levels of leave variegation and small- or medium-diameter stems, and has high ornamental value. This study aims to investigate the influence in photosynthetic capacity caused by variation in photosynthetic pigment content of four phenotypes of S.tootsik f. luteoloalbostriata cultivation, to lay a certain foundation for the cultivation and breeding of the bamboos with leave variegation. Method: Two-year-old seedlings of S. tootsik f. luteoloalbostriata were taken as materials. Photosynthetic pigment content, photosynthetic parameters and chlorophyll fluorescence parameters of the leaves of four phenotypes, including the whole green leaves, green leaves with white stripes, white leaves with green stripes and whole white leaves, were measured, and ultrastructure of green and white mesophyll cells were observed as well. Result: There was a significant difference in photosynthetic pigment content among four phenotypes, and it showed a significant reduction trend as the green area decreased in the leaves. The organelles of green mesophyll cells in S. tootsik f. luteoloalbostriata mesophyll were compact and intact, the chloroplast was well developed, and the membrane system was also well developed. In most white mesophyll cells, no complete chloroplast was found. Instead, degraded chloroplasts and etioplasts were found. The chlorophyll content was positively correlated with net photosynthetic rate, stomatal conductance, transpiration rate and water use efficiency, but negatively correlated with the intercellular CO2 concentration. The original light energy capacity was low in white leaves due to the lack of PSⅡ reaction center, and a series self-protection of light inhibition could not be carried out. Conclusion: The developmental defect of chloroplasts in white mesophyll cells of S. tootsik f. luteoloalbostriata obstructed the chlorophyll synthesis, which affected the photosynthetic ability, so that the net photosynthetic rate was negative. With a poor self-protection mechanism, white leaves are easy to be burned under strong light, so appropriate shade is needed.

Key words: Sinobambusa tootsik f. luteoloalbostriata, photosynthetic pigment, chloroplast structure, photosynthetic characteristics, chlorophyll fluorescence

CLC Number: