关键词: 盐胁迫, 小麦, 衣藻藻粉, 光合作用, 光合生理指标, 叶绿素荧光参数

Abstract: The wheat seedlings under normal condition were as control（CK），the effects of Chlamydomonas algal liquid［0 g/L（T0），0.25 g/L（T1），0.5 g/L（T2），1.0 g/L（T3）and 2.0 g/L（T4）］on photosynthetic pigment content，photosynthetic gas exchange parameters and chlorophyll fluorescence parameters of wheat seedlings under high salt stress were investigated，so as to provide a theoretical basis for the application of Chlamydomonas algal liquid in wheat under salt stress.The results showed that wheat seedlings of CK had the highest photosynthetic pigment content，net photosynthetic rate（Pn），stomatal conductance（Gs），CO₂ concentration（Ci），transpiration rate（Tr），actual optical quantum yield of optical system Ⅱ［Y（Ⅱ）］，maximum photochemical efficiency（Fv/Fm），electron transport rate（ETR），photochemical quenching coefficient（qP），and the lowest non‑photochemical quenching coefficient（qN）.The contents of chlorophyll a，total chlorophyll and carotenoids of T1—T4 treatments were higher than those in T0 treatment，especially T3 and T4 treatments.The Pn，Gs，Ci and Tr of T1—T4 treatments were higher than those of T0 treatment at 6—12 days after treatment，and T3 treatment was generally the highest，followed by T4 treatment.The Fv/Fm，ETR，Y（Ⅱ）and qP of T1—T4 treatments were overall higher than those of T0 treatment at 6—12 days after treatment，and T3 treatment was generally the highest，followed by T4 treatment；qN of T1—T4 treatments were lower than that of T0 treatment at 6—
12 days after treatment.In general，1.0 g/L Chlamydomonas algal liquid has the best effect.

Key words: Salt stress, Wheat, Chlamydomonas algal powder, Photosynthesis, Photosynthetic physiological indexes, Chlorophyll fluorescence parameters