Wasabi - Quiz
Wasabi
  • 1. What type of water is required for optimal water wasabi growth?
A) Stable, constantly flowing cool water
B) Fast-moving boiling water
C) Stagnant warm water
D) Deep ocean salt water
  • 2. Besides flowing cool water, what else do optimal conditions for water wasabi include?
A) High salinity and high pressure
B) High quantity of dissolved oxygen and shade
C) Direct sunlight and dry soil
D) Muddy water and heavy winds
  • 3. What is the general optimal air temperature range for wasabi?
A) 25 °C - 35 °C
B) 0 °C - 5 °C
C) 20 °C - 30 °C
D) 8 °C - 18 °C
  • 4. Which specific air temperature range is cited by some studies as the ideal range for wasabi?
A) 22 °C - 25 °C
B) 5 °C - 8 °C
C) 18 °C - 22 °C
D) 12 °C - 15 °C
  • 5. What happens to the wasabi plant at air temperatures above 28 °C?
A) Rapid flowering and sweetening
B) Enhanced root growth
C) Heat damage and soft rot
D) Increased cold tolerance
  • 6. Which pathogen is associated with soft rot in wasabi during high heat?
A) Pseudomonas syringae
B) Erwinia sp.
C) Botrytis cinerea
D) Rhizopus stolonifer
  • 7. What effect do cold air temperatures below 8 °C have on wasabi?
A) Stimulate rhizome growth
B) Cause soft rot
C) Increase shoot development
D) Inhibit plant growth
  • 8. What is the ideal water temperature for wasabi?
A) 15 °C - 20 °C
B) 20 °C - 25 °C
C) 10 °C - 13 °C
D) 5 °C - 8 °C
  • 9. What oxygen level is required for wasabi roots for good growing conditions?
A) Exactly 3 ppm
B) Between 1 and 2 ppm
C) Below 5 ppm
D) Above 9 ppm
  • 10. At what water temperature do the required oxygenation levels for wasabi occur?
A) Above 25 °C
B) At exactly 28 °C
C) Between 30 °C and 35 °C
D) Below 20 °C
  • 11. How are plant nutrients supplied to water wasabi?
A) By direct sunlight absorption
B) By flowing water
C) By solid soil injection
D) By aerial misting only
  • 12. Which two nutrients are particularly important for wasabi growth?
A) Calcium and magnesium
B) Nitrogen and sulfur
C) Phosphorus and potassium
D) Iron and zinc
  • 13. Optimal wasabi growth has been documented with combined nitrogen supplementation and what amount of sulfur?
A) Zero sulfur
B) Massive amounts of sulfur
C) Lower amounts of sulfur
D) Equal amounts of sulfur
  • 14. What nitrogen concentration was found to increase plant height, shoot development, and rhizome growth?
A) 10 mg/L
B) 50 mg/L
C) 1000 mg/L
D) 300 mg/L
  • 15. What sulfur level, combined with nitrogen, increased plant height, shoot development, and rhizome growth?
A) 1000 mg/L
B) 100 mg/L
C) 10 mg/L
D) 500 mg/L
  • 16. Why is no additional fertilizer needed at the famous Daio Wasabi Farm?
A) Because the soil is naturally volcanic
B) Due to heavy rainfall
C) Due to runoff from upstream rice paddies
D) Because fertilizers are prohibited by law
  • 17. What do wasabi growers in Shizuoka apply monthly into the water supply?
A) A slow-release 12:12:12 fertilizer
B) Liquid nitrogen
C) Ammonium nitrate solution
D) Pure sulfur crystals
  • 18. What do Shizuoka wasabi growers spray the foliage with?
A) Hoagland solution
B) Sulfate fertilizer
C) Ammonium chloride
D) Pesticide
  • 19. According to hydroponic experiments, what type of nutrient concentration does wasabi prefer?
A) Zero nutrients
B) Low nutrient concentrations
C) Extremely saturated nutrients
D) High nutrient concentrations
  • 20. What strength of Hoagland solution resulted in optimal wasabi growth during hydroponic experiments?
A) Double strength
B) Triple strength
C) Full strength
D) 1/10–1/2 strength
  • 21. What ratio of ammonium to nitrate nitrogen produced the best results in experiments?
A) 10:90 ratio
B) 90:10 ratio
C) 100:0 ratio
D) 50:50 ratio
  • 22. What optimal pH level led to the highest shoot, root, and rhizome growth?
A) Around 7.8
B) Around 4.0
C) Around 8.5
D) Around 6.0
  • 23. How should the nutrient solution be managed under greenhouse conditions?
A) Continuously aerated and renewed weekly
B) Stagnant and replaced monthly
C) Heated and filtered daily
D) Sealed and never replaced
  • 24. How is wasabi generally characterized regarding ammonium and nitrate?
A) Averse to all nitrogen forms
B) Ammonium-sensitive and nitrate-preferring
C) Ammonium-preferring and nitrate-sensitive
D) Neutral to both forms
  • 25. What is wasabi's overall nutrient demand considered to be?
A) Extremely high nutrient demand
B) Non-existent nutrient demand
C) Unpredictable nutrient demand
D) Relatively low nutrient demand
  • 26. What common side effect can occur from eating raw fresh wasabi leaves?
A) Dizziness
B) Nausea
C) Diarrhea
D) Headache
  • 27. What is wasabizuke made of?
A) Grated wasabi root mixed with vinegar
B) Dried wasabi powder soaked in rice wine
C) Wasabi leaves pickled in sake lees
D) Fermented wasabi stems in soy sauce
  • 28. Wasabizuke is considered a specialty of which prefecture?
A) Kyoto Prefecture
B) Osaka Prefecture
C) Tokyo Prefecture
D) Shizuoka Prefecture
  • 29. What is the primary difference between wasabi and its common substitutes?
A) Substitutes have a longer-lasting oil-based burn
B) Wasabi has no pungent aftertaste
C) Substitutes are much spicier than real wasabi
D) Wasabi is naturally green
  • 30. What is horseradish referred to as in Japan?
A) Hon wasabi
B) Aka wasabi
C) Kona wasabi
D) Seiyō wasabi
  • 31. What chemical provides wasabi's initial pungency?
A) Sinigrin
B) Allyl isothiocyanate
C) Capsaicin
D) Methylthioalkyl
  • 32. Allyl isothiocyanate is produced by the hydrolysis of what compound?
A) Glucose
B) Capsanthin
C) Myrosinase
D) Allyl glucosinolate
  • 33. What enzyme catalyzes the hydrolysis reaction that produces allyl isothiocyanate?
A) Lipase
B) Myrosinase
C) Amylase
D) Pepsin
  • 34. Why does the wasabi plant release allyl isothiocyanate when damaged?
A) As a defense mechanism
B) To attract pollinators
C) To accelerate leaf growth
D) To retain moisture during droughts
  • 35. What is the chemosensory receptor that acts as the sensory neural target of mustard oil?
A) GABA
B) TRPV1
C) NMDA
D) TRPA1
  • 36. TRPA1 is also known by what name?
A) The pungency sensor
B) The wasabi receptor
C) The spice detector
D) The capsaicin receptor
  • 37. Which of the following is a breakdown product from the hydrolysis of thioglucosides in wasabi?
A) 6-(Methylsulfinyl)hexyl isothiocyanate
B) Capsaicinoid polymer
C) Allyl caproate
D) Piperine extract
  • 38. Why are the burning sensations of wasabi short-lived compared to capsaicin?
A) They are neutralized by saliva enzymes
B) They evaporate into the air instantly
C) They are not oil-based
D) They dissolve only in solid food
  • 39. Where is the burning sensation of wasabi felt primarily?
A) In the nasal passage
B) Along the roof of the mouth
C) On the tip of the tongue
D) In the back of the throat
  • 40. Inhaling or sniffing wasabi vapor has an effect similar to what substance?
A) Oxygen spray
B) Smelling salts
C) Vapor rub
D) Ammonia gas
  • 41. Wasabi vapor's effect was exploited by researchers attempting to create what device?
A) An automatic fire sprinkler
B) A personal air purifier
C) A smoke alarm for the deaf
D) A chemical weapon detector
  • 42. What prize was awarded in 2011 to the researchers studying wasabi vapor alarms?
A) The Kyoto Prize in Technology
B) The Breakthrough Prize in Life Sciences
C) The Nobel Prize in Physiology or Medicine
D) The Ig Nobel Prize in Chemistry
  • 43. What family does the wasabi plant belong to?
A) Brassicaceae
B) Fabaceae
C) Rosaceae
D) Solanaceae
  • 44. What part of the wasabi plant is primarily grown and used to make paste?
A) Leaves
B) Rhizomes
C) Flowers
D) Seeds
  • 45. What does wasabi stimulate more?
A) The throat
B) The lips
C) The nose
D) The tongue
  • 46. From what century does the oldest record of wasabi as a food date?
A) 12th century
B) 5th century
C) 17th century
D) 8th century
  • 47. When did the popularity of wasabi in English-speaking countries begin growing steadily?
A) About 1920
B) About 1980
C) About 2000
D) About 1950
  • 48. Who named Cochlearia (?) wasabi in 1830?
A) Matsumura
B) Siebold
C) Miquel
D) Maximovich
  • 49. Who first described the wasabi plant as Lunaria (?) japonica in 1866?
A) Miquel
B) Matsumura
C) Siebold
D) Koidzumi
  • 50. Who erected the genus Wasabia in 1899?
A) Koidzumi
B) Matsumura
C) Miquel
D) Maximovich
  • 51. Who transferred the wasabi plant to the genus Eutrema in 1930?
A) Koidzumi
B) Siebold
C) Matsumura
D) Miquel
  • 52. When do wasabi flowers begin to flower in Japan due to cold temperatures?
A) November
B) March
C) January
D) May
  • 53. When does sprouting of wasabi seeds typically begin in nature after winter dormancy?
A) June
B) February
C) December
D) April
  • 54. Traditionally, what is used to grate the fresh wasabi root?
A) Wooden graters
B) Metal oroshigane
C) Stone blocks
D) Coarse sharkskin
  • 55. What metal graters are used in modern times to grate wasabi?
A) Daruma
B) Mazuma
C) Wasabi-mame
D) Oroshigane
  • 56. What percentage of raw wasabi root consists of carbohydrates?
A) 0.63%
B) 69.1%
C) 4.8%
D) 23.5%
  • 57. What part of the water wasabi is it especially valued for?
A) Its seeds
B) Its leaves
C) Its large rhizome
D) Its flowers
  • 58. What medium is traditionally used instead of soil in wasabi growing methods?
A) Solid concrete
B) Plastic sheets
C) Clay and topsoil
D) A permeable medium
  • 59. What is the oldest traditional wasabi cultivation method mentioned?
A) Tatamiishi style
B) Jizawa style
C) Keiryu style
D) Hokusun style
  • 60. What terrain inclination is typically used in the Jizawa style cultivation method?
A) 1-2%
B) 10-12%
C) 3-4%
D) 15-20%
  • 61. In what year was the Tatamiishi style of wasabi cultivation introduced?
A) 1892
B) 1750
C) 1897
D) 1905
  • 62. What is the bottom layer of the Tatamiishi cultivation style composed of?
A) Soil
B) Sand
C) Large rocks
D) Pebbles
  • 63. What is the surface soil layer in the Tatamiishi style made of?
A) Gravel
B) Mud
C) Clay
D) Sand
  • 64. What is an improvement of the Tatamiishi style introduced in 1897 that uses drain pipes?
A) Keiryu style
B) Hokusun style
C) Jizawa style
D) Hirachi style
  • 65. Which cultivation style is known for efficiently making use of water in low-rainfall conditions?
A) Keiryu style
B) Jizawa style
C) Tatamiishi style
D) Hirachi style
  • 66. Traditional wasabi cultivation can be viewed as an early form of what modern technique?
A) Aeroponics
B) Genetic modification
C) Crop rotation
D) Hydroponics
  • 67. Which of the following is a common substrate used in modern hydroponics for wasabi?
A) Clay loam
B) Compost
C) Topsoil
D) Rockwool
  • 68. Which substance is used to treat or disinfect return flow in closed hydroponic systems?
A) Ammonia
B) Chlorine bleach
C) Sodium chloride
D) Ozone
  • 69. What radiation type is used for disinfection in modern hydroponic return flow treatment?
A) Infrared radiation
B) Ultraviolet radiation
C) X-ray radiation
D) Gamma radiation
  • 70. What process is used for the automated control of pH and nutrient composition in modern systems?
A) Fertigation
B) Filtration
C) Sublimation
D) Irrigation
  • 71. What does field wasabi require in addition to mild winters and cool summers?
A) Salty soil
B) Direct sunlight
C) Good drainage
D) High humidity
  • 72. How many traditional cultivars do modern cultivars of wasabi mostly derive from?
A) Five
B) Two
C) Three
D) Four
  • 73. Which of the following is one of the three traditional wasabi cultivars?
A) Hokkaido Green
B) Kyushu Premium
C) Tokyo Gold
D) Fujidaruma
  • 74. What genome sequencing supports the conclusion about modern wasabi cultivars?
A) Chloroplastic genome
B) Nuclear genome
C) Ribosomal genome
D) Mitochondrial genome
  • 75. How is the chloroplastic genome inherited in wasabi?
A) Maternally
B) Biparentally
C) Randomly
D) Paternally
  • 76. As far south as which Japanese location do artificial wasabi cultivation facilities exist?
A) Shikoku
B) Okinawa
C) Kyushu
D) Honshu
  • 77. As far north as which Japanese location do artificial wasabi cultivation facilities exist?
A) Niigata
B) Sendai
C) Hokkaido
D) Aomori
  • 78. Which country is NOT listed as an exporter of wasabi to Japan?
A) Canada
B) France
C) United States
D) Brazil
  • 79. What is the trend of domestic production of wasabi in Japan as of 2022?
A) Continuous decline
B) Stays completely stable
C) Rapid increase
D) Fluctuating unpredictably
  • 80. What reason is cited for the decline of domestic wasabi production in Japan?
A) Lack of farmers
B) Urban sprawl
C) Warming climate
D) Water pollution
  • 81. In which Chinese province is wasabi mostly produced?
A) Zhejiang
B) Guangdong
C) Sichuan
D) Yunnan
  • 82. What was the worth of wasabi leafstalk per metric ton in China as of 2023?
A) CNY 3500
B) CNY 20000
C) CNY 5000
D) CNY 1500
  • 83. What was the worth of wasabi rhizome per metric ton in China as of 2023?
A) CNY 3500
B) CNY 20000
C) CNY 35000
D) CNY 10000
  • 84. 10,000 mu of wasabi fields in China is equivalent to how many hectares?
A) 2,000 hectares
B) 1,000 hectares
C) 667 hectares
D) 134 hectares
  • 85. The wasabi field area in China is roughly what fraction of the global wasabi field area?
A) One-quarter
B) One-third
C) One-fifth
D) One-half
  • 86. How many hectares of fields does one particular company run in China?
A) 50 hectares
B) 300 hectares
C) 134 hectares
D) 667 hectares
  • 87. Which Japanese company grows water wasabi in Yunnan?
A) NISSAN
B) ASUTA
C) TOYOTA
D) SONY
  • 88. Which European country is listed as commercially growing wasabi?
A) Greece
B) Italy
C) Spain
D) Iceland
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