Effects of arbuscular mycorrhizal fungi on photosynthesis and chlorophyll fluorescence of maize seedlings under salt stress

Abstract

The impact of arbuscular mycorrhizal fungi (AMF) Glomus. tortuosum on morphology, photosynthetic pigments, chlorophyll (Chl) fluorescence, photosynthetic capacity and rubisco activity of maize under saline stress were detected under potted culture experiments. The experimental result indicated the saline stress notably reduced both dry mass and leaf area in contrast with the control treatment. Nevertheless, AMF remarkably ameliorated dry mass and leaf area under saline stress environment. Besides, maize plants appeared to have high dependency on AMF which improved physiological mechanisms by raising chlorophyll content, efficiency of light energy utilization, gas exchange and rubisco activity under salinity stress. In conclusion, AM could mitigate the growth limitations caused by salinity stress, and hence play a very important role in promoting photosynthetic capacity under salt stress in maize.

Study of the effects of mycorrhiza, fulvic acid, seaweed extract and urea on physiological traits and leaf yield of tobacco (Burley 21)

“…Fernández-Lizarazo and Moreno-Fonseca (2016) conclude that mycorrhiza can enhance the water potential, stomatal conductance and nutritional content of plants and finally result in an increase in plant growth during periods of drought. Also a higher dry mass and leaf area and enhancement of chlorophyll content, light energy absorption, gas exchange and Rubisco activity of plants inoculated with mycorrhiza growing under salinity stress is reported by Xu et al (2018). Corrêa et al (2006) report that the response of plants to mycorrhiza depends on "their age (stage of development, leaf area), their initial nutritional status and the amount of nitrogen supplied".…”

The Effect of Arbuscular Mycorrhizal Fungi on Photosystem II of the Host Plant Under Salt Stress: A Meta-Analysis

“…Photosynthesis, the key process of primary metabolism, is sensitive to salinity [5]. Salt stress can reduce the CO 2 availability by limiting diffusion through stomata and the mesophyll, 2 of 14 destroying the photosystems II (PS II) reaction center and disrupting electron transport from PS II to PS I [6][7][8]. These adverse effects lead to a decline in photosynthetic capacity and ultimately inhibit plant growth.…”

“…Many studies have also used chlorophyll fluorescence analysis to evaluate the positive effect of AMF on the photosynthetic capacity of the host plant under salinity stress, including Oryza sativa [7], Jatropha curcas [11], and Zea mays [8]. Chlorophyll fluorescence is a rapid, non-destructive method to examine the stress features and photosynthetic performance of a plant [12].…”

Influence of Mixed Substrate and Arbuscular Mycorrhizal Fungi on Photosynthetic Efficiency, Nutrient and Water Status and Yield in Tomato Plants Irrigated with Saline Reclaimed Waters

“…Therefore, mechanisms other than those studied must have been in operation. Several studies have demonstrated an improvement in gas exchange and fluorescence parameters following the application of AMF in horticultural crops [67][68][69], including tomato [70]. In our case, the low relative percentage of root colonization prevented greater changes in plant physiology from being observed.…”