Effect of seed priming with zinc, iron and selenium on the low temperature tolerance of Nicotiana tabacum L. during seed germination.

Tobacco is one of the important cash crops in China. It is sensitive to low temperature, especially in the early stage of tobacco seed germination and seedling growth. Low temperature stress directly affects the germination of tobacco seeds, leading to irregular emergence and slow growth of seedlings.

Isopropylmalate synthase as a potential molecular marker for seed vigor in tobacco.

Seed vigor is an important trait for tobacco production. However, the evaluation of seed vigor using molecular biomarkers is scarcely reported in tobacco. In this study, the development of molecular marker isopropylmalate synthase was conducted to detect seed ageing degree and seed priming effect in tobacco.

Chemical Composition of Tobacco Seed Oils and Their Antioxidant, Anti-Inflammatory, and Whitening Activities.

Tobacco seeds are a valuable food oil resource, and tobacco seed oil is rich in nutrients, especially polyunsaturated fatty acids. The aim of this work was to perform a comprehensive study on the chemical constituents, and the antioxidant, anti-inflammatory, and whitening activities of tobacco seed oils (NC89 and BS4). A GC/MS analysis revealed that NC89 and BS4 had 11 and 6 volatile compounds, respectively.

Advances in the Understanding of Reactive Oxygen Species-Dependent Regulation on Seed Dormancy, Germination, and Deterioration in Crops.

Reactive oxygen species (ROS) play an essential role in the regulation of seed dormancy, germination, and deterioration in plants. The low level of ROS as signaling particles promotes dormancy release and triggers seed germination. Excessive ROS accumulation causes seed deterioration during seed storage.

Suppression of LOX activity enhanced seed vigour and longevity of tobacco ( L.) seeds during storage.

The preservation of seed viability and quality in storage is an important trait both for commercial and germplasm usage. To better explore potential mechanisms of tobacco seed deterioration, seed packed in cloth bag (C) and vacuum bag (V) were stored under room temperature (RT) and low temperature (LT, 18°C), and sampled periodically for laboratory testing. Seed stored in low temperature with vacuum bag (LT/V) owned the highest seed vigour after 25 months of storage and in room temperature with cloth bag (RT/C) lost seed vigour and germination ability after 20-month storage.

[Advances of NIR spectroscopy technology applied in seed quality detection].

Near infrared spectroscopy (NIRS) technology developed fast in recent years, due to its rapid speed, less pollution, high-efficiency and other advantages. It has been widely used in many fields such as food, chemical industry, pharmacy, agriculture and so on. The seed is the most basic and important agricultural capital goods, and seed quality is important for agricultural production.

An enhanced drought-tolerant method using SA-loaded PAMPS polymer materials applied on tobacco pelleted seeds.

Drought is one of the most important stress factors limiting the seed industry and crop production. Present study was undertaken to create novel drought-resistant pelleted seeds using the combined materials with superabsorbent polymer, poly(2-acrylamide-2-methyl propane sulfonic acid) (PAMPS) hydrogel, and drought resistance agent, salicylic acid (SA). The optimized PAMPS hydrogel was obtained as the molar ratio of 2-acrylamido-2-methyl-propanesulfonic acid (AMPS) to potassium peroxydisulfate (KPS) and N, N'-methylene-bis-acrylamide (MBA) was 1 : 0.

[Antioxidant enzyme activities and proline content in maize seedling and their relationships to cold endurance].

This paper studied the catalase (CAT) and peroxidase (POD) activities and proline (Pro) content in the seedling's root, mesocotyl (including coleoptile node) , and coleoptile (including infancy leaf) of two maize inbred lines Huang C (cold-endurance) and Mo17 (cold-sensitive), and their relationships to cold endurance under low temperature stress (5 degrees C, 3 d). The results showed that under the low temperature stress, Huang C had a significantly higher relative growth rate of mesocotyl and coleoptile than Mo17, and the change rates of CAT and POD activities and Pro content in the root, mesocotyl and coleoptile of Huang C were higher than those of Mo17. The plasma membrane permeability of the three segments of both inbred lines was significantly increased, but Huang C had significantly lower plasma membrane permeability than Mo17.