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Polymers 2018, 10(10), 1154;

Effects of Calcium Alginate Submicroparticles on Seed Germination and Seedling Growth of Wheat (Triticum aestivum L.)

2,* , 1,* and 1,*
Liaoning Provincial Key Laboratory of Carbohydrates, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
School of Food Science and Engineering, Dalian Ocean University, Dalian 116023, China
School of Environment Science and Engineering, Dalian Maritime University, Dalian 116026, China
Jinxia He and Ruixin Li contributed equally to this work.
Authors to whom correspondence should be addressed.
Received: 20 September 2018 / Revised: 5 October 2018 / Accepted: 6 October 2018 / Published: 16 October 2018
(This article belongs to the Special Issue Polysaccharides)
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Calcium alginate (CaAlg) submicroparticles have a potential application in agricultural delivery systems. This study investigated the effects of CaAlg submicroparticles on seed germination and seedling growth of wheat. CaAlg submicroparticles with a Z-average diameter of around 250.4 nm and a measured zeta potential value of about −25.4 mV were prepared and characterized by dynamic light scattering (DLS), scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer (EDS). After this, the effects of the concentration of CaAlg submicroparticles (10–500 μg/mL) on germination percentage, seedling length, the number of adventitious roots, chlorophyll content and soluble protein content were evaluated. The results demonstrated a significant increase in the level of germination percentage (9.0%), seedling index (50.3%), adventitious roots (27.5%), seedling length (17.0%), chlorophyll (8.7%) and soluble protein contents (4.5%) at a concentration of 100 μg/mL. However, an inhibitory effect was observed at a concentration of 500 μg/mL. The SEM examination showed that CaAlg submicroparticles could be successfully adsorbed onto the surface of the wheat seed. Further studies proved that CaAlg submicroparticles at a concentration of 100 μg/mL promoted the expression of indole-3-acetic acid (IAA)-related genes (YUCCA9, AUX1, ARF and UGT) in wheat, which resulted in an increase of 69% and 21% in IAA concentration in wheat roots and shoots, respectively. View Full-Text
Keywords: calcium alginate submicroparticles; seed germination; seedling growth; wheat calcium alginate submicroparticles; seed germination; seedling growth; wheat

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He, J.; Li, R.; Sun, X.; Wang, W.; Hu, J.; Xie, H.; Yin, H. Effects of Calcium Alginate Submicroparticles on Seed Germination and Seedling Growth of Wheat (Triticum aestivum L.). Polymers 2018, 10, 1154.

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