Promoting Effect of Soluble Polysaccharides Extracted from Ulva spp. on Zea mays L. Growth.

Ragaa A Hamouda,Muneera A Saleh,Khalid H Alamer,Eman M Sharaf,Reham M Abd El-Azeem,Mervat H Hussein,Mohammed A Karim-Eldeen,Luluah M Al Masoudi,Noura El-Ahmady El-Naggar

doi:10.3390/molecules27041394

Abstract

Seaweeds can play a vital role in plant growth promotion. Two concentrations (5 and 10 mg/mL) of soluble polysaccharides extracted from the green macroalgae Ulva fasciata and Ulva lactuca were tested on Zea mays L. The carbohydrate and protein contents, and antioxidant activities (phenols, ascorbic, peroxidase, and catalase) were measured, as well as the protein banding patterns. The soluble polysaccharides at 5 mg/mL had the greatest effect on the base of all of the parameters. The highest effects of soluble polysaccharides on the Zea mays were 38.453, 96.76, 4, 835, 1.658, 7.462, and 38615.19, mg/mL for carbohydrates, proteins, phenol, µg ascorbic/mL, mg peroxidase/g dry tissue, and units/g tissue of catalase, respectively. The total number of protein bands (as determined by SDS PAGE) was not changed, but the density of the bands was correlated to the treatments. The highest band density and promoting effect were correlated to 5 mg/mL soluble polysaccharide treatments extracted from Ulva fasciata in Zea mays, which can be used as a biofertilizer.

Highlights

The third most vital cereal crop in the world is maize (Zea mays L.), which comes after wheat, followed by rice [1]
Untawale [13] deliberated the impacts of marine algal extracts on the growth of turnips and chillies, and showed that minor concentrations of seaweed liquid fertilizer (SLF) increased the seed germination rate
Wajahatullah et al [14] reported that algae and algae-derived products are extensively exhausted as additives in crop-yield systems due to the presence of several plant growth-promoting (PGP) compounds

Summary

Introduction

The third most vital cereal crop in the world is maize (Zea mays L.), which comes after wheat, followed by rice [1]. Dhargalkar and Untawale [13] deliberated the impacts of marine algal extracts on the growth of turnips and chillies, and showed that minor concentrations of seaweed liquid fertilizer (SLF) increased the seed germination rate. Seed germination, developed crop production, and enhanced resistance to both biotic and abiotic stress were all found to be beneficial effects of seaweed extract applications on plants [15]. The growth and activities of microorganisms that were antagonistic to Pythium ultimum, a severe fungal pathogen that causes seedling damping-off disease, were estimated after liquid seaweed extracts were applied to the soil [17]. When marine algae extracts were added to cabbage-cultivated soil, growth was estimated and microorganisms antagonistic to Pythium ultimum (serious pathogenic fungi) were enhanced [17]. Ganapathy Selvam and Sivakuma [21] reported that the seaweed extracts of U. reticulata increase the crop productivity of Vigna mungo plants

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