Pythium ultimum|BNCC228214 |BNCC

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Pythium ultimum

Culture medium	Comprehensive PDA agar (CPDA): potato boil 1.0L, glucose 20.0g,KH2PO4 3.0g,MgSO4 · 7H2O 1.5g, vitamin B1 trace, agar 20.0g,pH 6.0±0.2. Sterilization at 121 ℃ for 15min. Potato boiling liquid: weigh 200g of peeled potato pieces, boil in boiling water for 30min, and collect the filtrate to a constant volume of 1.0L.
Subculture procedure	(1) Prepare 1-2 pieces of PDA plate; (2) sterilize the surface of test tube for the agar slant, open it in the biosafety cabinet; (3) cut into the pieces with aseptic inoculation hoe and inoculation shovel (see attached page). the size of square pieces is 0.5 × 0.5cm2; (4) lay flat the small pieces to the center of the agar plate; (5)put the plates under the above culture conditions, and the strains can be used when they grow.
Growth conditions	28 ℃,5-7 days, aerobic (the bacteria is not suitable for cryopreservation form (glycerol) preservation), suitable for paraffin preservation.
Storage conditions	2-8 ℃
morphology	Small filamentous fungi, with obvious colonies on integrated PDA medium, white hyphae, dense and vigorous, concentric vines to the edge of the plate Extended growth, no spores.
Sharing mode	Public welfare sharing

Pythium ultimum

Storage conditions : 2~8 ℃

No. 228214

Product format: agar slant in 14mm test tube

Validity: growing culture, in 30 dyas

Biosafety level: 1 , handle in ultra-clean table or safety cabinet

Receiving notice: if any abnormality is found on the day of receipt, please contact the customer service within 24 hours. If it is overdue, it is deemed that the bacteria are well. The agar slant can be used directly. In principle, it can be used many times without contamination within the validity period, but viability will gradually decrease with time. Please operate in strict accordance with this instruction, otherwise the replacement of bacteria are not be available in case of aberrant growth and loss of viability.

Growth conditions :25-28 ℃, aerobic, integrated PDA agar medium, 5-7 days. Comprehensive PDA agar medium: potato boil 1.0L, glucose 20.0g,KH2PO4 3.0g,MgSO4·7H2O 1.5g, vitamin B1 trace, agar 20.0g,pH 6.0±0.2. Sterilization at 121 ℃ for 15min. Potato boiling liquid: weigh 200g of peeled potato pieces, boil in boiling water for 30min, and collect filtrate to a constant volume of 1.0L

Recovery steps:
(1)Prepare 1-2 pieces of PDA plates;
(2)sterilize the surface of test tube for the agar slant, open it in the biosafety cabinet;
(3) cut into the pieces with aseptic inoculation hoe and inoculation shovel (see attached page). the size of square pieces is 0.5 × 0.5cm2;
(4) lay flat the small pieces to the center of the agar plate;
(5)put the plates under the above culture conditions, and the strains can be used when they grow.
Recovery record: According to the recovery instructions, the results of the recovery are reported as follows:

Item	test results
viability:	good viability,in 5-7 days strain layer is obvious
colony morphology:	small filamentous fungi with obvious colonies on comprehensive PDA medium hyphae are white, dense and vigorous, spreading to concentric circles on the edge of the plate, and do not produce spores
Conclusion:	good viability, no abnormal colony morphology, qualified

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