Phenotypic Characteristics and Fatty Acid Composition of Seeds from Different Herbaceous Peony Species Native to China

Root Extracts of Two Cultivars of Paeonia Species: Lipid Composition and Biological Effects on Different Cell Lines: Preliminary Results

The roots of two cultivars of Paeonia, namely Paeonia officinalis “Rubra Plena” and Paeonia “Pink Hawaiian Coral”, have been extracted with chloroform. The composition of the lipid fraction, analyzed by GC–MS technique, revealed the absence of paeonol and the presence of phenol, benzoic acid, fatty acid—and some sterol—derivatives. The chloroformic extracts have been tested on normal and several cancer cell lines but showed antiproliferative activity only on the ovarian carcinoma and the osteosarcoma. The biological activity of extracts was investigated mainly by confocal microscopy, flow cytometry and quantum phase imaging. The results indicated that the root extracts induced a hyperpolarization of mitochondria and an increase in reactive oxygen species levels, without inducing cell death. These effects are associated to an increased doubling time and a retarded confluence.

Differences and Correlations of Morphological Characteristics and Fatty Acid Profiles of Seeds of Toona sinensis

Toona sinensis (A.Juss.) M.Roem., a multi-purpose tree of Meliaceae, is widely distributed and intensively cultivated in Asia, yet its high yielding, lipid-rich seeds are rarely exploited. The present study systematically analyzed the differences and correlations of seed morphological characteristics and fatty acid (FA) profiles of 62 representative T. sinensis germplasms distributed across northern to southern China. T. sinensis seeds were rich in total FAs (TFA, 107.03-176.18 mg/g). Additionally, linoleic acid (54.69-100.59 mg/g), α-linolenic acid (ALA, 22.47-45.02 mg/g), oleic acid (OA, 5.12-23.94 mg/g), palmitic acid (6.87-14.14 mg/g), stearic acid (SA, 3.13-6.57 mg/g) and elaidic acid (1.70-2.88 mg/g) were the major FAs measured by GC/MS analysis. Size (average width of 3.94±0.01 mm and length of 5.79±0.02 mm) and mass (average thousand-seed weight of 10.52±0.17 g) were greater in T. sinensis seeds collected south than north of 30° latitude. These traits were also positively correlated with unsaturated FA content and negatively related to SA and saturated FA contents (P<0.05). Significant positive correlations were found between seed length and polyunsaturated FA (R² =0.370) and ALA levels (R² =0.296), as well as between thousand-seed weight and monounsaturated FAs (R² =0.309) and OA levels (R² =0.297) (P<0.05). Seventeen T. sinensis germplasms gathered by cluster analysis as cluster IV were determined as desirable for oil processing due to their higher TFA and ALA contents and greater seed size and mass than others. Generally, the wider, heavier, and especially longer seeds of T. sinensis contain much higher levels of FAs, especially ALA, and are the more promising sources for breeding and the oil processing industry.

Insights into the Phytochemical Composition and Bioactivities of Seeds from Wild Peony Species

Peony is an important medicinal and ornamental plant widely cultivated in the world. Its seeds as a functional food source have attracted much more attention in recent years, and they are rich in monoterpene glycosides and phenolic compounds. To assess the application value of wild peony seeds, the main chemical composition and content, such as total phenolic content (TPC), total flavonoid content (TFC), total flavanol content (TAC), and α and γ tocopherol content, of the seeds from 12 species and 2 subspecies were systematically explored in the present study. Four different antioxidant assays (DPPH, ABTS, FRAP, and HRSA), antibacterial, and antifungal assays were also performed using various in vitro biochemical methods. The results showed that the seeds of P. delavayi, P. obovata. subsp. obovata, and P. rockii. subsp. rockii had a high content of TPC, TFC, and TAC, respectively. Twenty-five individual chemical compounds were qualitatively and quantitatively measured by HPLC-MS, with paeoniflorin being the most abundant compound in all samples. P. mairei was grouped individually into a group via hierarchical cluster analysis according to its relatively highest monoterpene glycosides and TPC content. This work has provided a basis for the development and utilization of seeds for the selection of wild peony species of dietary interest.

Evaluating the Comprehensive Performance of Herbaceous Peonies at low latitudes by the Integration of Long-running Quantitative Observation and Multi-Criteria Decision Making Approach

Enlarging the planting area of economic plants, such as the "Southward Planting of Herbaceous Peony" (Paeonia lactiflora. Pall), is significant for improving people's lives. Peony is globally known as an ornamental because of gorgeous flowers and is mainly cultivated in the temperate regions with relatively cool and dry climates in the Northern Hemisphere. Promoting the landscape application of peony to the lower latitude regions is difficult because of the hot-humid climate. In this study, 29 northern peony cultivars and a unique Chinese southern peony, 'Hang Baishao', were introduced to Hangzhou, located in the central subtropics. Annual growth cycles, resistances and dormancy durations were measured, and crossbreeding between the southern and northern peonies was performed for six years, from 2012 to 2017. Based on data collected from the long-running quantitative observation (LQO), a multi-criteria decision making (MCDM) system was established to evaluate the comprehensive planting performance of these 30 cultivars in the central subtropics. 'Qihua Lushuang', 'Hang Baishao' and 'Meiju' were highly recommended, while 'Zhuguang' and 'Qiaoling' were scarcely recommended for the Hangzhou landscape. This study highlights the dependability and comprehensiveness of integrating the LQO and MCDM approaches for evaluating the introduction performance of ornamental plants.