Carbon dot-embedded hydrogels promote maize germination and growth under drought stress†

IF 8.3 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Materials & Interfaces Pub Date : 2024-04-16 DOI:10.1039/D4EN00070F

Yuying Ren, Xiaona Li, Bingxu Cheng, Le Yue, Xuesong Cao, Chuanxi Wang and Zhenyu Wang

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引用次数: 0

Abstract

Herein, tannic acid-derived carbon dots (TACDs) embedded gelatin hydrogels (GTACDs) were formed by hydrogen bonding and electrostatic interactions. TACDs (10 ppm) improved the swelling ratio, water retention ratio, modulus (G′ and G′′) and compressive stress of gelatin hydrogels. GTACDs (10 ppm) coated maize seeds (Zea may L.) could increase the germination rate by 19% and the shoot and radicle lengths of maize seedlings (6th day) by 19%, 139.0% (p < 0.001) and 32.2% (p < 0.001), respectively. Also, the fresh weight of shoots and roots (30th day) increased by 124.0% (p < 0.01) and 124.2% (p < 0.05) and increased the dry weight of shoots and roots by 106.3% and 181.9%, respectively. The net photosynthetic rate (A), stomatal conductance (Gs) and transpiration rate (E) increased by 111.9%, 141.0% and 132.7% (p < 0.05), respectively. In the early stages of germination, GTACDs (10 ppm) as seed coating could absorb soil moisture and release TACDs entering seeds and up-regulate the expression of aquaporin (AQP) genes of the radicles. Meanwhile, TACDs eliminated ROS produced from roots and transported to leaves to improve photosynthesis under drought stress. Furthermore, GTACDs had a positive impact on soil biochemical properties, significantly increased the rhizosphere soil of TC, TN, TIC and TOC, and the relative abundance of beneficial rhizosphere microorganisms. These results demonstrated that GTACDs can promote maize germination and growth with low environmental risk. Therefore, GTACDs would be a prospective measure for environmentally friendly agricultural technology in response to drought stress.

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碳点嵌入水凝胶在干旱胁迫下促进玉米发芽和生长

其中，单宁酸衍生碳点（TACDs）嵌入明胶水凝胶（GTACDs）是通过氢键和静电相互作用形成的。TACDs（10 ppm）提高了明胶水凝胶的溶胀率、保水率、模量（G′和G′′）和压缩应力。包衣玉米种子（Zea may L.）的 GTACDs（10 ppm）可使发芽率提高 19%，玉米幼苗（第 6 天）的芽长和胚根长分别增加 19%、139.0%（p < 0.001）和 32.2%（p < 0.001）。此外，芽和根的鲜重（第 30 天）分别增加了 124.0% (p < 0.01) 和 124.2% (p < 0.05)，芽和根的干重分别增加了 106.3% 和 181.9%。净光合速率（A）、气孔导度（Gs）和蒸腾速率（E）分别增加了 111.9%、141.0% 和 132.7% (p <0.05)。在种子萌发初期，GTACDs（10 ppm）作为种子包衣剂可吸收土壤水分，并释放 TACDs 进入种子，上调胚根水蒸发素（AQP）基因的表达。同时，TACDs 能消除根部产生的 ROS 并将其输送到叶片，从而改善干旱胁迫下的光合作用。此外，GTACDs 还对土壤生化性质产生了积极影响，显著提高了根圈土壤中 TC、TN、TIC 和 TOC 的含量，以及根圈有益微生物的相对丰度。这些结果表明，GTACDs 可以促进玉米发芽和生长，且环境风险较低。因此，GTACDs 将成为应对干旱胁迫的环境友好型农业技术的前瞻性措施。

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来源期刊

ACS Applied Materials & Interfaces 工程技术-材料科学：综合

CiteScore

16.00

自引率

6.30%

发文量

4978

审稿时长

1.8 months

期刊介绍： ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.