Impact of nanometer hydroxyapatite on seed germination and root border cell characteristics

Abstract

Nanometer hydroxyapatite is beneficial to cucumber seeds and seedlings at concentrations less than 2000 mg L−1.

The Efficiency of Nanoparticles on Improving Seed Germination and Mitigating Ammonium Stress of Water Spinach (Ipomoea aquatica Forssk.) and Hami Melon (Cucumis melo L.)

“…According to Wang et al [31], hydroxyapatite nanoparticles suspension promoted root growth of lettuce with the concentration range of 100-2000 mg L −1 while retarded root growth of tomato with the concentration range of 500-2000 mg L −1 . In the present study, the best optimal dose of nMgO or nHA in the present study is 100 mg L −1 for seed germination and seedling growth of water spinach and Hami melon, and adding high concentrations of nMgO or nHA exerted negative effects, which was probably caused by producing or releasing oxhydryl, changing the solution pH and allowing nanoparticles to enter the plant cells [21]. Moreover, nHA was also found to have a more positive effect on the growth of two crops, which was probably related to the nanoparticle charge and size [32].…”

“…Among the nanoparticles being widely used for agricultural purposes, hydroxyapatite nanoparticles (nHA) are considered good one due to having good biocompatibility with large micro-interfaces, high microporosity, allowing photo-catalytic adsorption, specific adsorption, and surface adsorption during contact with pollutants, thus reducing the biotoxicity and migration capacity of pollutants. It is also considered an effective material in the remediation of soil contamination, especially heavy metal contamination [20,21]. Magnesium oxide NPs (nMgO) have also been a choice of interest due to their being nontoxic, safe, and easy to obtain.…”