Lahore College for Women University, Department of Botany, Lahore, Pakistan.
China National Rice Research Institute, State Key Laboratory of Rice Biology, Hangzhou, China.
Braz J Biol. 2021 Sep 15;83:e245206. doi: 10.1590/1519-6984.245206. eCollection 2021.
A huge amount of rice cultivation and consumption occur in Asia particularly in Pakistan and China. However, multiple abiotic stresses especially high and low-temperature proved to be a substantial threat for rice production ultimately risks for food security. To overcome various types of abiotic stress; seed priming is among the effective approaches to improve the rice seed germination and growth vigor. Therefore, the present study was planned to evaluate physiological and biochemical modifications in Chinese and Pakistani rice varieties by Qiangdi 863 biological assistant growth apparatus nano treated water (NTW), Osmopriming Calcium chloride (CaCl2), redox priming hydrogen peroxide (H2O2) and hormonal priming by Salicylic acid (SA) under temperature stress conditions. The experiment was performed with completely randomize design conditions. Five rice varieties, nomenclature as Zhongzoa 39, (Chinese rice variety) KSK 133, KS 282, Super basmati and PK 1121 aromatic (Pakistani rice variety) were sown under low temperature (LT) (17ºC), optimal temperature (OT) 27ºC and high temperature (HT) 37ºC conditions. The present study indicated that nanopriming were the most effective treatments increased Germination Energy Percentage (GEP) (96.1, 100, 100%), Speed of Germination (SG) (27.2, 35.45, 37.1), Final Germination Percentage (FGP) (98.2, 99.1, 99.4%), Seedling Dry Weight Biomass (DWB) (0.1, 0.137, 0.14g), Total Chlorophyll Content (0.502, 13.74, 15.21), antioxidant enzymes Superoxide Dismutase (SOD)(3145, 2559, 3345 µg-1FWh-1), Catalase (CAT) (300, 366, 3243 µg-1FWh-1) and decreased Malondialdehyde (MDA) (6.5, 12.2, 6.5 µmol g-1 FW) for Zhongzao 39 and KSK 133 rice varieties under low (LT+NTW), optimal temperature (OP+NTW) and high temperature (HT+NTW) stress., Therefore, nano-priming is recommended to cope with the high and low-temperature stress conditions along with improved productivity of rice.
亚洲，尤其是巴基斯坦和中国，有大量的水稻种植和消费。然而，多种非生物胁迫，特别是高温和低温，对水稻生产构成了严重威胁，最终危及粮食安全。为了克服各种非生物胁迫，种子引发是提高水稻种子发芽和生长活力的有效方法之一。因此，本研究计划使用强地 863 生物助生长仪纳米处理水（NTW）、渗压素氯化钙（CaCl2）、氧化还原引发过氧化氢（H2O2）和激素引发水杨酸（SA），评估中国和巴基斯坦水稻品种的生理和生化变化，以在温度胁迫条件下。该实验采用完全随机设计条件进行。播种了五个水稻品种，命名为 Zhongzoa 39（中国水稻品种）、KSK 133、KS 282、Super basmati 和 PK 1121 芳香（巴基斯坦水稻品种），分别在低温（LT）（17°C）、最适温度（OT）27°C和高温（HT）37°C条件下。本研究表明，纳米引发处理可显著提高发芽能量百分比（GEP）（96.1%、100%、100%）、发芽速度（SG）（27.2%、35.45%、37.1%）、最终发芽百分比（FGP）（98.2%、99.1%、99.4%）、种子干重生物量（DWB）（0.1g、0.137g、0.14g）、总叶绿素含量（0.502、13.74、15.21）、超氧化物歧化酶（SOD）（3145、2559、3345μg-1FWh-1）、过氧化氢酶（CAT）（300、366、3243μg-1FWh-1）和丙二醛（MDA）（6.5μmol g-1FW、12.2μmol g-1FW、6.5μmol g-1FW），从而减轻 Zhongzao 39 和 KSK 133 水稻品种在低温（LT+NTW）、最适温度（OP+NTW）和高温（HT+NTW）胁迫下的胁迫。因此，纳米引发被推荐用于应对高温和低温胁迫条件，同时提高水稻的生产力。
