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Articles by Yaya Hasanah
Total Records ( 5 ) for Yaya Hasanah
  Yaya Hasanah , Lisa Mawarni and Herla Rusmarilin
  Background and Objective: Natural Plant Growth Regulator (PGR) not only affects the growth and yield of binahong, but also affects the physiological characteristics of binahong. The objective of the research was to determine the impact of the foliar application of natural PGR (shallot extract, banana hump extract and bamboo shoot extract) on physiological characteristics of binahong. Materials and Methods: The research use a non-factorial randomized block design with 7 treatment and 4 replication. The natural PGR treatment in the research was without natural PGR ; shallot extract 40 mL nL1; bamboo shoots extract 40 mL L1; banana hump extract 40 mL L1; shallot extract (20 mL L1)+bamboo shoot extract (20 mL L1); shallot extract (20 mL L1)+banana hump extract (20 mL L1); bamboo shoots extract (20 mL L1)+banana hump extract (20 mL L1). The variables observed were chlorophyll a, chlorophyll b, total chlorophyll, density of stomata and cuticle thickness. Data were analyzed by using analysis of variance at p = 0.05. Results: The result showed that the application of natural PGR decreased stomatal density compared to control (without natural PGR application), but increased chlorophyll a, chlorophyll b and total chlorophyll. Natural PGR of shallot extract 40 mL L1 application increased total chlorophyll. Banana hump extract 40 mL L1 application increased the cuticle thickness compared to other natural PGR. Conclusion: It was concluded that application of natural PGR decreased the stomatal density, but increased the total chlorophyll. Banana hump extract 40 mL L1 application increased the cuticle thickness compared to other natural PGR.
  Yaya Hasanah , Lisa Mawarni , Hamidah Hanum , Ferry Ezra Sitepu and Bayu Ardi
  Background and Objective: Chlorophyll a and b are the main pigments require magnesium for light energy and the synthesis of both. Kieserite (MgSO4·H2O) contains magnesium which plays an important role as the central atom of the porphyrin ring of green plant pigments, chlorophyll a and b. The aim of the study was to evaluate the role of magnesium in kieserite on physiological characteristics of soybean varieties. Materials and Methods: The study was conducted in Deli Tua, Deli Serdang Regency, Sumatera Utara from May to August, 2019. The experimental design used was a factorial randomized block design. As the first factor, soybean varieties consist of Demas, Anjasmoro, Devon-1, Dering-1. The second factor is dose of kieserite (MgSO4.H2O) applied consisting of 0, 50, 100 and 150 kg kieserite ha1. Results: The study result indicated that the highest of chlorophyll content was found in Anjasmoro variety compared to other varieties. The highest total chlorophyll and stomatal density was found in combination of Anjasmoro and 50 kg kieserite ha1. Conclusion: The treatment 50 kg kieserite ha1 on Anjasmoro increased the chlorophyll content about 30% and stomatal density 15.56%.
  Yaya Hasanah , Lisa Mawarni , Hamidah Hanum , Rosita Sipayung , Muhammad Thoha Rhamadan and Lisda Tarigan
  Background and Objective: Sulphur is very important to increase assimilate translocation to enlarge bulbs, forming essential amino acids. The presence of growth inhibitors is necessary to focus energy on the formation of shallot bulb. The aim of this research was to evaluate the role of sulphur and Paclobutrazol on the production and physiological characteristics of shallot from true shallot seed. Materials and Methods: The study was conducted in Medan, Sumatera Utara, from June-October, 2020. The experimental design used was a factorial randomized block design. The first factor was sulphur application (0, 75 and 150 kg ZA ha1) and the second factor was concentration of Paclobutrazol (0, 15 and 30 ppm) to observe the true shallot seeds variety. Results: The result of the research indicated that the highest of chlorophyll a, chlorophyll b, total chlorophyll, wet weight and dry weight of shallot bulbs were found in the application of sulphur 150 kg ZA ha1 and without application of Paclobutrazol. Conclusion: The highest of total chlorophyll, bulb dry weight wet weight of shallot bulbs, chlorophyll total, shallot bulb wet weight and shallot bulbs dry weight were found in the sulphur treatment 150 kg ZA. ha1 and without Paclobutrazol. The highest of chlorophyll total was found in Paclobutrazol 15-30 ppm application.
  Yaya Hasanah and Mariani Sembiring
  Background and Objective: Elicitors could be used not only to increase isoflavone concentration of soybean seeds but also to influence the physiological characteristics of soybean. The objective of this research was to determine the effects of foliar applications of elicitor compounds (i.e., chitosan and salicylic acid) on the physiological characteristics of two soybean varieties. Materials and Methods: The research used a randomized block design with 2 factors and 3 replications. The first factor was soybean cultivar (Wilis and Devon). The second factor was foliar application consisting of without elicitor, chitosan at the four fully developed trifoliate leaves (V4), chitosan at the early podding (R3), chitosan at the V4 and R3, salicylic acid at the V4, salicylic acid at the R3 and salicylic acid at the V4 and R3. The parameters observed were chlorophyll a, chlorophyll b, total chlorophyll content and stomatal density. The data were analyzed by using analysis of variance (ANOVA) at p = 0.05. Results: The results suggest that the Devon cultivar had higher content of chlorophyll a and total chlorophyll, while Wilis cultivar had higher content of chlorophyll b and stomatal density. The foliar application with salicylic acid at the V4 resulted in the highest chlorophyll a and total chlorophyll content, while the chitosan application at the V4 and R3 resulted in the highest chlorophyll b content. The application of salicylic acid at the V4 at Wilis cultivar increased stomatal density, while the chitosan application at the V4 at Devon cultivar increased the stomatal density. Conclusion: It is concluded that in Wilis cultivar, the foliar application of salicylic acid at the V4 increased the chlorophyll a content, total chlorophyll content and stomatal density, while in the Devon cultivar, the foliar application of salicylic acid at the R3 resulted in the highest chlorophyll b content, while the application of chitosan at the V4 in Devon cultivar increased the stomatal density.
  Yaya Hasanah , Luthfi Aziz Mahmud Siregar and Lisa Mawarni
  Background and Objective: Increased accumulation of isoflavones in soybeans can be done by inducing a soybean with biotic or abiotic elicitor which stimulates production of phytoalexin in soybean. The objective of the research was to determine the best elicitor for increasing isoflavone content in Anjasmoro and Wilis cultivar. Materials and Methods: The research design used in this study was a randomized block design factorial. The treatments are 3 factors and 3 replications. The first factor is soybean cultivars (Anjasmoro and Wilis). The second factor is foliar application of elicitors consisted of without elicitor; chitosan (1 mg mL–1), methyl jasmonate (0.5 mM) and salicylic acid (0.5 mM). The third factor is the time of foliar application of elicitors consisted of V4 (four trifoliate leaves are fully developed) and R3 (early podding). The parameters of observations are genistein, daidzein, glycitein and total isoflavones. The data were subjected to two-way analysis of variance (ANOVA) procedures, the SAS version 12 computer program and comparison of means were tested for significance using Duncan’s Multiple Range Test (DMRT) (p = 0.05). Results: The results suggested that in Wilis cultivar, the foliar application of chitosan elicitor at R3 is able to increase the content of genistein (25.10%), daidzein (42.76%), glycitein (76.50%) and total isoflavones (37.04%). Conclusion: The best treatment in increasing the content of genistein, daidzein, glycitein and total isoflavones in Wilis cultivar is foliar application of chitosan elicitor at R3.
 
 
 
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