• Title/Summary/Keyword: sprouting

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Effects of Fumigation Treatment on the Physiological Changes of Onion Bulbs (훈증처리가 양파의 생리학적 변화에 미치는 영향)

  • Kim, Hyun-Ku;Lee, Hyeong-Choon;Park, Mu-Hyun;Shin, Dong-Hwa
    • Korean Journal of Food Science and Technology
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    • v.18 no.1
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    • pp.6-10
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    • 1986
  • Fumigation of onion bulbs with Tetrachloroisophthalonitrile reduced weight loss by half of the control. The weight losses of the control onion bulbs stored at 80% RH were lower than those stored at 90% RH but no significantly different in case of fumigated onion bulbs. No rooting and sprouting to outside were detected during low temperature storage ($0^{\circ}C$) and $Q_{10}$ value of onion bulbs during storage was the range of 1.9-2.1. The weight losses of onion bulbs during storage were mainly due to decay rather than respiration, because there was positive correlation between weight loss and decay rate during storage period but not respiration ratio.

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Influence of Forcing Cultivation Time on Cut Flower, Root Quality, and Yield in Peony (Paeonia lactiflora Pall. cv. Taebaek) (작약 촉성재배 시기가 절화와 뿌리품질 및 수량에 미치는 영향)

  • Bae, Su-Gon;Kim, Jwoo-Hwan;Park, Sang-Jo;Kim, Jae-Cheol
    • Korean Journal of Medicinal Crop Science
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    • v.16 no.6
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    • pp.421-426
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    • 2008
  • Three year-old peony (Paeonia. lactiflora Pall. cv. Taebaek) was cultivated in green-house at Jan. 15, Feb. 15, or Mar. 15, respectively. The mean of temperature during the forcing cultivation was higher (air; $1.0{\sim}11.1^{\circ}C$, soil; $1.1{\sim}7.4^{\circ}C$) than that of open-field condition. From sprouting to flowering in peony cultivated at Jan. 15 was about 54 days, which is shorted the cut flower periods (ca. 26 days) compared with the open-field cultivation. However, earlier forcing cultivars were very susceptible to pathogens such as powdery mildew or gray mold. The yield in green house was also lower than in the open-field cultivation. The content of bioactive compounds such as paeoniflorin and albiflorin in green-house cultivars was similar that of open-field cultivars. These results showed the forcing cultivation time of peony at Feb. 15 in green-house was most desirable for commercialization.

The Breeding of “Sawonppong 27” that is Autotetraploid of the Sangilppong which has Good Mulberry Dwarf Resistance (Morus spp.) (뽕나무 오갈병에 강한 常一뽕의 동질4배체 ″4原뽕27號″ 創成)

  • 박광준
    • Journal of Sericultural and Entomological Science
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    • v.44 no.1
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    • pp.1-3
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    • 2002
  • The colchicine drop treatment is done on the growthpoint of the Sangilppong, which is the leading mulberry variety for mulberry dwarf resistance. So the breeding of the Sawonppong 27, that is tetraproidy, is succeeded and the chracteristics of this is as follows. The chromosome number of it is 2n=56, tetraproidy. The spring sprouting stage is midseason mulberry variety, and the leaf has a broad width shape that the oval leaf and the 3 lobed leaf exist simultaneously, The thickness of leaf is thick, the branch length and internorde length are short. The nonbudding of basal part does not exist and the cold hardness of this is stronger than the Sangilppong.

Effect of Application of Nitrogen and Phosphate Fertilizer on Yield and Storage of Onions (Allium CePa L.) (질소 및 인산 시비량이 양파의 수량 및 저장성에 미치는 영향)

  • 김희대;서전규
    • Food Science and Preservation
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    • v.5 no.2
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    • pp.123-126
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    • 1998
  • This study was carried out investigate to optimum levels of nitrogen and phosphate fertilizer to get a higher yield and a quality of an onion(Allium Cepa L.) from 1993 to 1994. Three fertilizer levels were applied with 120, 240 and 360kg/ha of nitrogen and 100, 200 and 300kg/ha of P2O5 during the onion growing season. After harvesting the onion, it was storaged at given deposit. The growth and yield of the onion were better at the fertilizer levels of both 240 and 360kg/ha of nitrogen and of both 200 and 300kg/ha of P2O5 than at the level of 120kg/ha in nitrogen and 100kg/ha of P2O5. The content of total nitrogen and P2O5 in plant was decreased with reduced application levels of nitrogen and phosphate fertilizer. The rotting rate was higher at the levels of both 360kg/ha in nitrogen and 300kg/ha in P2O5 than the other treatment during the storage period. The sprouting rate tended to be high at 240kg/ha of nitrogen and 100kg/ha of P2O5.

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Hesperetin Inhibits Vascular Formation by Suppressing of the PI3K/AKT, ERK, and p38 MAPK Signaling Pathways

  • Kim, Gi Dae
    • Preventive Nutrition and Food Science
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    • v.19 no.4
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    • pp.299-306
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    • 2014
  • Hesperetin has been shown to possess a potential anti-angiogenic effect, including vascular formation by endothelial cells. However, the mechanisms underlying the potential anti-angiogenic activity of hesperetin are not fully understood. In the present study, we evaluated whether hesperetin has anti-angiogenic effects in human umbilical vascular endothelial cells (HUVECs). HUVECs were treated with 50 ng/mL vascular endothelial growth factor (VEGF) to induce proliferation as well as vascular formation, followed by treatment with several doses of hesperetin (25, 50, and $100{\mu}M$) for 24 h. Cell proliferation and vascular formation were analyzed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and tube formation assay, respectively. In addition, cell signaling related to cell proliferation and vascular formation was analyzed by western blot. Furthermore, a mouse aorta ring assay was performed to confirm the effect of hesperetin on vascular formation. Hesperetin treatment did not cause differences in HUVECs proliferation. However, hesperetin significantly inhibited VEGF-induced cell migration and tube formation of HUVECs (P<0.05). Moreover, hesperetin suppressed the expression of ERK, p38 MAPK, and PI3K/AKT in the VEGF-induced HUVECs. In an ex vivo model, hesperetin also suppressed microvessel sprouting of mouse aortic rings. Taken together, the findings suggest that hesperetin inhibited vascular formation by endothelial cells via the inhibition of the PI3K/AKT, ERK and p38 MAPK signaling.

Effects of Water Potential on Plant Growth and Aerenchyma Development in Adlay(Coix lacryma-jobi L. var. mayuen) (토양수분 차이가 율무의 생장과 통기조직 발달에 미치는 영향)

  • 김정태;박희생;김성만;이성환
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.42 no.6
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    • pp.778-782
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    • 1997
  • Effects of different water potential on the growth and aerenchyma development of Adlay(Coix lacryma-jobi L. var. mayuen) were studied under every 3 days intermittent irrigation as a control at different growth stages, flooded pot condition and drought. Adlay could not germinate in the anaerobic soil conditions with excessive moisture while it wasn't inflicted with moisture damage after sprouting. Sprouted adlay can grow under flooded soil moisture condition because it's root has orthostichy cell, ventilating structure and cortex. Proping or ventilating roots were generated from adlay grown under flooded pots. Drought damage inflicted at the heading stage was the most severe.

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Regulatory Effects of Samul-tang on Axonal Recovery after Spinal Cord Injury in Rats

  • Lee, Ki-Tae;Kim, Yoon-Sik;Ryu, Ho-Ryong;Jo, Hyun-Kyeng;An, Jung-Jo;Namgung, Uk;Seol, In-Chan
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.20 no.5
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    • pp.1303-1310
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    • 2006
  • In oriental medicine, Samul-tang (SMT) has been used for the treatment of cardiovascular diseases and neuronal disorders. Here, possible effects of SMT on axonal regeneration after the spinal cord injury were examined. SMT treatment induced increases in regeneration-related proteins GAP-43, cell division cycle 2 (Cdc2) and phospho-Erk1/2 in the peripheral sciatic nerves after crush injury. Increased levels of Cdc2 and phospho-Erk1/2 were observe mostly in the gray matter area and some in the dorsomedial white matter. These increases correlated with increased cell numbers in affected areas. Moreover, axons of corticospinal tract (CST) showed increased sprouting in the injured spinal cord when administrated with SMT compared with saline-treated control. Thus, the present data indicate that SMT may be useful for identifying active components and for therapeutic application toward the treatment of spinal cord disorders after injury.

Vital tooth with periapical lesion: spontaneous healing after conservative treatment (생활치에서 나타나는 치근단 병소: 보존적 치료 후 자연치유)

  • Kim, Hyun-Joo;Lee, Seung-Jong;Jung, Il-Young;Park, Sung-Ho
    • Restorative Dentistry and Endodontics
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    • v.37 no.2
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    • pp.123-126
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    • 2012
  • It is often presumed that apical periodontitis follows total pulp necrosis, and consequently root canal treatment is commonly performed. Periapical lesion development is usually caused by bacteria and its byproduct which irritate pulp, develop pulpitis, and result in necrosis through an irreversible process. Afterwards, apical periodontitis occurs. This phenomenon is observed as an apical radiolucency in radiographic view. However, this unusual case presents a spontaneous healing of periapical lesion, which has developed without pulp necrosis in a vital tooth, through conservative treatment.

Influence of Selected Turfgrass Herbicides, Simazine, Pendimethalin, Propyzamide and Asulam on the Growth of Zoysia matrella (Zoysia matrella의 생장에 미치는 잔디용 제초제 Simazine, Pendimethalin, Propyzamide, Asulam의 영향)

  • 김석정
    • Asian Journal of Turfgrass Science
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    • v.7 no.2_3
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    • pp.81-94
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    • 1993
  • This study was conducted to investigate the influence of herbicides, simazine, pendimethalin, propyzamide and asulam on the growth of Zoysia matrella when they are treated at different growth stages of the plant. The reaction of Zoysia matrella to herbicides differed depending on kinds of herbicides, their concentcations, and time of treatment. Simazine at the higher concentration of 600g /l0a exhibited inhibitory effect on leaf dry matter and growth of runner when treated on April 5, 1991. The highest inhibition of leaf and runner was observed in the plot applied on May 23, 1990. The sprouting and growth of Zoysia matrella was not affected by all the concentrations of the herbicides applied on October 23,1991. Pendimethalin did not influence the growth of Zoysia matrella at he treatment of April 5. However, at the treatment of May 23, the number and growth of runner was inhibited although the plant height and leaf dry matter was not affected. When pendimethalin was treated on October 23, the growth of runner was very slightly reduced in the next year. In case of propyzamide, there was no inhibitory effect on the growth of Zoysia matrella regardless of treatment of times, methods, and dosages. Greater inhibition in the growth of Zoysia matrella was observed at higher dosage(1,ll0g /l0a)-treated plot on April 5 and all the concentrations treated on May 23. But, no inhibition was observed on the October 23 treatment.

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Characteristics of lateral bud development, necrosis and genesis of flower primordium in 'Kyoho' grapevines

  • Park, Jun Young;Jung, Myung Hee;Kim, Bo Min;Park, Yo Sup;Kim, Jun Hyeok;Park, Hee-Seung
    • Korean Journal of Agricultural Science
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    • v.47 no.4
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    • pp.987-993
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    • 2020
  • This study investigated the effective harvest of 'Kyoho' grapevines by examining their characteristics including bud development, necrosis types and flower primordium formation. The size of the axillary bud did not show any difference in the 5th node or more, but it was smaller because it was closer to the base in the 4th node or less. In the 1st node, the rates of main bud necrosis (MBN), accessory bud necrosis (ABN), and whole bud necrosis (WBN) were high, and the rate of flower primordium formation was low, but there was no significant difference in the other nodes. Therefore, it was expected that using other nodes than the 1st node would be advantageous to secure production. Because the growth progresses after sprouting, the main bud necrosis rate increases, showing a very low flower primordium formation rate in March of the following year. Therefore, a method is needed to increase the storage nutrients in the winter and the rate of flower primordium formation after March. This study found that the thickness of the shoots should be less than 8.5 mm between the 3rd and 4th nodes, and the length should be less than 60 cm for nodes up to the 10th node.