Ensuring high-quality agricultural products has become important in agriculture since society’s standard of living has risen. Meanwhile, Moringa oleifera L. leaf extract (MLE) has been used as a plant biostimulant to improve product quality. The effectiveness of MLE is associated with its beneficial components, consisting of nutrients, phytohormones, secondary metabolites, amino acids, and bioactive compounds. Previous studies have been carried out to find the effects of MLE application on the quality of different crops, including basil, kale, spinach, maize, radish, brinjal, pepper, tomato, grape, strawberry, and more. The results are generally positive concerning physical, nutritional, and chemical qualities. This review comprises recent findings regarding MLE application as a plant biostimulant to increase quality attributes, with its underlying mechanism.

With the rapid growth in global population and standards of living, improving food production and quality are the greatest challenges in agriculture. The application of biostimulant derived from moringa leaf extract (MLE) has attracted a great deal of interest to support these efforts in a sustainable approach. A field study was conducted using a randomized complete block design with four replications. The effect of individual and combined application of MLE through seed priming (seed soaking) and foliar spray at different rates (1:30, 1:20, and 1:10, v/v) on growth, physiological, yield, and quality traits of green chili pepper were investigated, which was the aim of this study. In general, the responses generated by the combined MLE methods were more pronounced compared to their single applications. Among all treatments, MLE priming plus foliar spray at 1:30 was effective in improving most traits observed, including chlorophyll fluorescence (6.49%), stomatal conductance (57.19%), plant height (30.57%), leaf number (88.89%), leaf area index (116.67%), fruit weight per plant (46.27%), average fruit weight (39.62%), length (9.89%), diameter (29.65%), firmness (27.77%), and vitamin C content (29.07%) of fruit. Therefore, it is regarded as an appropriate treatment to maximize the potential use of MLE in green chili.

Sari Peningkatan suhu global akibat peningkatan konsentrasi CO2 di atmosfer sangat berpotensi terjadi cekaman kekeringan pada tanaman kentang. Fenomena ini dapat mempengaruhi proses fisiologis tanaman. Zat Pengatur Tumbuh (ZPT) asam salisilat dan paclobutrazol mampu memberikan perlindungan bagi tanaman terhadap cekaman kekeringan melalui serangkaian proses fisiologis seperti peningkatan aktivitas fotosintesis. Penelitian ini bertujuan untuk mengetahui interaksi antara ZPT dan cekaman kekeringan serta memperoleh jenis ZPT dan kondisi cekaman kekeringan yang masih mampu menghasilkan karakter fisiologis tanaman kentang terbaik di dataran medium. Percobaan bertempat di Kebun Percobaan Ciparanje, Jatinangor, pada ketinggian 685 m di atas permukaan laut. Rancangan percobaan yang digunakan adalah rancangan petak terbagi. Petak utama terdiri dari interval penyiraman 1, 4, 8, dan 12 hari, sedangkan anak petak terdiri atas tanpa ZPT, asam salisilat, paclobutrazol, serta kombinasi asam salisilat dan paclobutrazol. Setiap perlakuan diulang sebanyak 3 kali. Hasil penelitian menunjukkan bahwa tidak terdapat pengaruh interaksi antara jenis ZPT dengan cekaman kekeringan terhadap seluruh parameter fisiologis. Penambahan ZPT paclobutrazol mampu menghasilkan respons terbaik terhadap konduktansi stomata serta suhu kanopi. Sementara itu, tanaman kentang pada 9 MST masih mampu memberikan respons fluoresensi klorofil terbaik hingga interval penyiraman 4 hari.Kata kunci: Kentang ∙ Cekaman kekeringan ∙ Asam salisilat ∙ Paclobutrazol Abstract. The rising of CO2 concentration increases global temperature. This phenomenon potentially causes drought stress in potato plant and lead to interfere its physiological process. Plant growth regulator (PGR) such as salicylic acid and paclobutrazol are expected to protect the plant due to the drought stress through improving photosynthesis activity. This study aimed to understand the interaction between PGR and drought stress; and find out the types of PGR and drought stress condition which are able to provide the best physiological responses of potato plant in medium altitude. The experiment was conducted in Ciparanje Experimental Field, Jatinangor, at an altitude 685 m above sea level. Split plot design was used as the experimental design. The main plot was watering interval, consisted of 1, 4, 8, and 12 day; while the subplot was PGR treatment, consisted of non-PGR, salicylic acid, paclobutrazol, and the combination of salicylic acid and paclobutrazol. All of the treatments were replicated for 3 times. The results showed that interactions were not occurred between PGR and drought stress to all physiological parameters. The treatment of paclobutrazol exhibited stomatal conductance and canopy temperature. Meanwhile, the potato plant showed good responses on chlorophyll fluorescence 9 WAP until 4 days watering interval.Keywords: Potato ∙ Drought stress ∙ Salicylic acid ∙ Paclobutrazol

Peningkatan suhu global akibat peningkatan CO2 di atmosfer dapat menyebabkan cekaman kekeringan pada tanaman kentang. Aplikasi zat pengatur tumbuh (ZPT) asam salisilat dan paclobutrazol mampu meningkatkan pertumbuhan dan hasil tanaman saat cekaman kekeringan melalui peningkatan aktivitas fotosintesis. Tujuan penelitian ini adalah untuk mengetahui interaksi cekaman kekeringan dengan jenis ZPT terhadap indeks luas daun, nisbah pupus akar, dan hasil tanaman kentang. Penelitian dilaksanakan di Kebun Percobaan Ciparanje, Jatinangor menggunakan rancangan split plot dengan tiga kali ulangan. Petak utama adalah interval penyiraman, terdiri dari 1, 4, 8, dan 12 hari, sedangkan anak petak yaitu jenis ZPT, terdiri dari tanpa ZPT, asam salisilat, paclobutrazol, dan kombinasi asam salisilat dan paclobutrazol. Hasil penelitian memperlihatkan tidak terdapat interaksi cekaman kekeringan dengan jenis ZPT. Perlakuan interval penyiraman 1 hingga 4 hari masih mampu memberikan indeks luas daun serta jumlah dan bobot ubi pertanaman paling baik. Aplikasi kombinasi ZPT asam salisilat dan paclobutrazol menurunkan indeks luas daun, namun mampu meningkatkan bobot ubi per tanaman.

Clitoria ternatea has well-known potential roles for medicinal purposes because it is a source of antioxidants. Drying is important for obtaining C. ternatea extract by removing the moisture from the fresh materials. However, it might also influence bioactive compounds and alterations of sensory, nutritional, and physical qualities. This study aimed to determine the best combination of drying method and C. ternatea accession for yield and quality of extract without damaging its bioactive compounds and antioxidant activities. A completely randomized block design with nine combination treatments was used in this study. Each treatment was replicated three times. Drying methods consisted of shade drying, sun drying, and oven drying, while C. ternatea accessions were white single petal, blue single petal, and blue double petal. The LCMS analysis of single blue petal of C. ternatea in methanol extract showed that the dominant metabolites found were flavonoid groups; quercetin, kaempferol, and luteolin. Total phenolic content was recorded higher in blue double petal accession of C. ternatea combined with the sun drying method. Moreover, shade drying combined with white single petal of C. ternatea achieved the best total extraction yield, flavonoid, antioxidant activity (IC50), kaempferol, and quercetin yields. Due to its affordability, shade drying is a potential best option for drying C. ternatea, particularly for white single petal accession.