Light Antenna of PSII Affects Stomatal Movement and Growth of Arabidopsis

Md.Sarwar, Jahan and M, Nozulaidi and M, Khairi (2017) Light Antenna of PSII Affects Stomatal Movement and Growth of Arabidopsis. In: 27th Malaysian Society of Plant Physiology Conference, 21 August 2017, Pulai Springs Resort, Johor, Malaysia.

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Abstract

Light-harvesting complexes (LHCs) control light-depended energy transfer in photosystem II (PSII) of Arabidopsis plants. To consider whether defective of LHCs controlled glutathione (GSH) levels that modulate light-induced plant growth, we assessed light related parameters using chlorinal-1 (ch1-1) mutant, a GSH deficient mutant due to defective of LHCs, and linked this with wild-type (WT) Arabidopsis plants. The ch1-1 mutants accumulated significantly lower levels of non-photochemical quenching (qn and NPQ), an efficient quantum yield of PSII {Y (II)} and regulated energy dissipation of PSII {Y (NPQ)} than WT plants. The growth of leaf and plant decreased in the ch1-1 mutant plants compared to the WT plants. These results suggest that defective of LHCs might control the growth of the ch1-1 mutant Arabidopsis plants through regulating the GSH levels and light energy in PSII.

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