Effect of giberelin (GA3) concentration on growth and yield of Chinese kale (Brassica oleracea L. Var alboglabra) in various medium using hydroponic wick system . This research conducted from April until July 2016 in Wire House and Plant Physiology Laboratory, Department of Biology, Faculty of  Mathematics and Natural Science, Andalas University. The purposes of this research were to obtain GA3 concentration and planting medium that accelerate growth and yield of Chinese kale and determine the interaction between GA3 and planting medium to the gowth and yield of Chinese kale planted using hydroponics wick system. This research used Completely Randomized Design (CRD) in factorial with three replications, as the first factor were concentration of GA3 (0 ppm, 20 ppm, 40 ppm and 60 ppm) and the second factor were medium (zeolite, sand, husk and sawdust). The best result in accelerated the growth of Chinese kale was the treatment at the concentration of 60 ppm GA3 and zeolite was suitable medium to Chinese kale growth. This research found the interaction between GA3 and medium on the length of the roots Chinese kale used hydroponic wick system.

The research about callus induction Artemisia vulgaris L. by giving several concentration 2,4-Dichlorophenoxyacetic acid (2,4-D), has been done from . The aim of this study was found the effective concentration of 2,4-D to induce callus of A. vulgaris. The research used Completely Randomized Design (CRD) with 7 treatments and 4 replications. The treatments were : without 2,4-D (control); 0.25 mg/L 2,4-D; 0.50 mg/L 2,4-D; 0.75 mg/L 2,4-D; 1.00 mg/L 2,4-D; 1.25 mg/L 2,4-D; 1.5 mg/L 2,4-D. The result showed that 0.25-1,5 mg/L 2,4-D were able induction callus of A. vulgaris, with compact until the friable texture, color of the resulting callus is yellowish green, brownish-green, yellow-brown, white yellowish and greenish white. 2,4-D 1.5 mg/L was the best concentration to increase fresh weight of callus.

The research about effect of Nitrogen fertilizer and stress water on the growth and artemisinin content of Artemisia vulgaris L. has been conducted from December 2015 to March 2016 in Screen House and Plant Physiology Laboratory, Department of Biology, Faculty of  Mathematics and Natural Science, Andalas University, Padang. The purpose of this research were to the effect of  Nitrogen fertilizer, stress water, and their interaction between on the growth and artemisinin content of A. vulgaris. This research used Completely Randomized Design (CRD) in factorial with  four treatments ad three replications. The result showed that the number of leaves, plant height, length of roots, fresh weight, dry weight and of Artemisia vulgaris L. were increased significantly on N fertilizer treatments. The treatment of stress water 60% of volume capacity gave significantly effect on numbers of leaves and the highest content of Artemisinin was 80% volume capacity. The interaction of  N fertilizer and stress water did not showed significantly effect on the growth and artemisinin content of Artemisia vulgaris L.

The research about application of liquid organic fertilizers with indigenous microorganism bioactivator of HPPB for growth of Desmodium heterophyllum on limestone mined land at PT. Semen Padang, had been conducted from May to August 2015 in Nursery and Reforestation, Laboratory of Plant Physiology Department of Biology, and the Laboratory of Soil Science Faculty of Agriculture, Andalas University, Padang. The research aimed to determine the effect and concentration of Liquid Organic Fertilizers (LOF) by using indigenous microorganism bioactivator originated from HPPB in limestone mined land ofPT. Semen Padang. This study used Completely Randomized Design (CRD) with five treatments and four replications. The treatments were control without LOF (A), 10% LOF (B), 20% LOF (C), 30% LOF (D) and 40% LOF (E). The results showed that 10% LOF was the best concentration to increase the number of leaves (36,44), percentage of land cover (6,71%) and fresh weight of plants (5,15g).

The research about induction of somatic embryogenesis of  Orchid Vanda sumatrana Schltr.  by giving 2,4-Diclorophenoxiacetic acid (2,4-D), was conducted from May to July 2016 in plant Physiology and tissue Culture Laboratory, Biology Departement, Matematics and Natural Science Faculty, Andalas University. The aim of this study was found the concentration of 2,4-D to induce somatic embryogenesis of Vanda sumatrana. The research used Completely Randomized Resign (CDR) with 6 treatments and 4 replication. The treatments were : without 2,4-D (control); 1 mg/L; 2 mg/L; 3 mg/L; 4 mg/L; 5 mg/L. The result showed that 2 mg/L 2,4-D and 3 mg/L 2,4-D were concentrations to induct somatic embryogenesis.

Currently, seaweed extracts are widely used as plant biostimulants to increase the efficiency of nutrient use, tolerance of abiotic stress, and improve plant quality. In this study, tested the effect of different Padina minor seaweed extract formulas (liquid extract and powder extract) and the frequency of application of Padina minor seaweed extract (b0 = control; b1 = 1 x application; b2 = 2 x application; and b3 = 3 x application) as a biostimulant to the growth of upland rice. From the results of the study, it was found that there was no significant effect of the application of the two extract formulas and the frequency of application, but the administration of Padina minor extract 3 times during vegetative growth increased all growth parameters, such as: plant height, number of tillers, fresh and dry weight of plants, and chlorophyll content. It was concluded that giving Padina minor extract 3 times could increase the vegetative growth of upland rice effectively.

The influence of Naphthalene Acetate Acid (NAA) on the in vitro root growth of banana Raja Kinalun was carried out from April to September 2015 in The Laboratories of Plant Physiology and Tissue Culture, Faculty of Mathematics and Natural Sciences, University of Andalas, Padang. The aim of  this study was to find the effective concentration of NAA for initiation of root. This study used a Completely Randomized Design (CRD) with four treatments and three replications. The treatments were: without NAA (control); NAA 1 ppm, NAA 2 ppm and NAA 3 ppm. The result showed that the effective doses were NAA 1 and 2 ppm for each number of roots growth.

Biostimulan alami adalah salah satu teknologi paling menjanjikan yang baru-baru ini diterapkan dalam sistem pertanian modern yang bertujuan menuju keberlanjutan. Biostimulan didefinisikan sebagai setiap produk yang merangsang efisiensi nutrisi tanaman secara independen dari kandungan nutrisinya dengan tujuan tunggal untuk meningkatkan satu atau lebih karakteristik tanaman atau rizosfer berikut, efisiensi penggunaan nutrisi, toleransi cekaman abiotik, atribut kualitas dan ketersediaan nutrisi. Moringa oleifera mengandung unsur makro dan mikro, zat pengatur tumbuh seperti sitokinin. Penelitian ini bertujuan untuk mengetahui konsentrasi ekstrak kelor dan cara aplikasi ekstrak serta interaksi antara konsentrasi dan cara aplikasi ekstrak yang dapat meningkatkan pertumbuhan dan umur panen kubis Singgalang. Metode yang digunakan adalah Rancangan Acak Lengkap (RAL) Faktorial dengan 2 faktor dan 3 ulangan. Faktor A merupakan taraf konsentrasi (kontrol, 1:64 (v/v), 1:32 (v/v) dan 1:16 (v/v)) dan faktor B merupakan cara aplikasi (daun, tanah dan gabungan daun dan tanah). Hasil penelitian menunjukkan bahwa ekstrak kelor dengan  konsentrasi 1:32 (v/v) mampu meningkatkan jumlah daun dan panjang akar kubis Singgalang. Cara aplikasi ekstrak tidak memberikan pengaruh yang berbeda nyata serta tidak terjadi interaksi antara konsentrasi dan cara aplikasi ekstrak terhadap pertumbuhan dan umur panen kubis Singgalang.