Stevia
19
« ِ ةَ كِ لاَ مْ ل ى اَ لَ عْ مُ هَ ضَ رَ عَ مُ ث اَ هَ لُ كَ اءَ مْ سَ لا اَ مَ ا’دَ مَ لَ عَ وَ * ,ن يِ قِ ادَ صْ مُ ت نُ كْ * نِ 4 ء ا لاُ َ هِ اءَ مْ سَ ِ 8 , يِ نُ ِ 8 نْ نَ اَ الَ قَ ف* َ تْ نَ اَ C كَ نِ 4 ا اَ نَ G نْ مَ لَ ع َ مَ لاِ 4 ا اَ نَ لَ مْ لِ ع لاَ C كَ L ن اَ حْ 8 بُ س واُ ل اَ قُ م, تِ كَ حْ ل اُ م, تِ لَ عْ ل ا* » ( رة ق8 ب ل ا ورة س31 - 32 ) Sunday, October 30, 202 2 M.Kh.Aboghrip phytopathology 2013 1
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Transcript of Stevia
ث�م� » ا ك�ل�ه� اء� م� األ�س� آد�م� و�ع�ل�م�ال� ق� ف� ال�م�الئ�ك�ة� ع�ل�ى م� ه� ض� ع�ر�
ك�نت�م� إ�ن� ه�ؤ�الء اء� م� س�ب�أ� ن�ب�ئ�ون�ي
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ال�ع�ل�يم� �ن�ت� أ �ن�ك� إ ت�ن�ا ع�ل�م� ا م� إ�ال� * ك�يم� «ال�ح�
البقرة ) (32-31سورة
April 8, 2023 M.Kh.Aboghrip phytopathology 2013 1
Untraditional crops Stevia
Under supervision
Dr. Mohamed SaidPrepared by
M.Kh.AboghripB.Sc. Agric. Ain-Shams Uni.M.Sc. BioChem. Banha Uni.
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SteviaO Introduction O Classification O Origin O Geographical distribution O Morphology O Environmental requirementO PropagationO Cultivation O Biological benefits O Chemical composition
IntroductionO stevia rebaudiana (Family:
Asteraceae) is one of only two species that produce sweet steviol glycosides.
O This Sweet Herb of Paraguay, is fast becoming a major source of high potency sweetener which has no calorific value.
O Several countries including India have started its commercial cultivation.
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Classification
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Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering
plantsClassMagnoliopsida– Dicotyledons
Subclass Asteridae GroupMonochlamydae
Order Asterales
Family Asteraceae– Compositae family
Subfamil
y
Asteroideae
Tribe Eupatorieae
Genus Stevia
Specie
rebaudiana
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OriginO Stevia is native to the valley of the
Rio Monday in highlands of Northeastern Paraguay in South America where it grows in sandy soils near streams on the edges of marshland, acid infertile sand or muck soils.
Geographical distribution
O The main producers of stevia are Japan, China, Taiwan, Thailand, Korea, Brazil, Malaysia and Paraguay. Currently,
O Stevia is consumed in Japan, Brazil, Korea, the United States of America, Argentina, China, Canada, Paraguay and Indonesia
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Plant morphology
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O Flower structure
O Different stages of flower opening.
O SEED
O (a) (b)
O Stevia seeds (a) infertile seeds are usually pale or clear and (b) fertile seeds are dark colored
Plant morphology
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O Leaf structureO Root
O stem structure
Environmental requirement
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O Latitude between 22º and 24º South LatitudeO Soils are generally slightly acidic 5.5 - 6.0 pHO Sandy loam to loam – natural soils are somewhat O mineralized semi-tropical soils in the category of
FerralsolsO Rainfall is generally in the 1200 – 1700 mm per year
and normally evenly distributed throughout the yearO Temperatures considered semi-tropical to temperate
averaging 15º to 35 ºC
.
PropagationO Vegetative Propagation
Seed propagationO Shoot Cuttings
O tissue culture
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Cultivation
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BIOSYNTHESIS OF STEVIA GLYCOSIDES
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EXTRACTION OF STEVIA GLYCOSIDES
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Biological propertiesO BIOLOGICAL
PROPERTIESO EFFECT AS A
SWEETENING AGENTO ANTIOXIDANT ACTIVITYO ANTI-INFLAMMATORY AND
IMMUNOMODULATORY ACTIVITY
O EFFECT ON REPRODUCTIVE SYSTEM
O MUTAGENIC AND BACTERICIDAL ACTIVITY
O EFFECT ON RENAL FUNCTION
O EFFECT ON BLOOD PRESSURE
O EFFECT ON BLOOD GLUCOSE
O ANTI-VIRAL ACTIVITYO INTESTINAL METABOLISMO GASTRO PROTECTIVE
ACTIVIO EFFECT ON K+ ION
CHANNELO ANTICANCER ACTIVITYO TOXICOLOGY
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•kills fungi
STEVIA SIDE EFFECTS & SAFETY
O Some people who take stevia or stevioside can experience bloating or nausea.
O Other people have reported feelings of dizziness, muscle pain, and numbness.
O Pregnancy and breast-feeding.O Stay on the safe side and avoid use.
O Allergy to ragweed and related plantsO Diabetes
O the chemicals contained in stevia might lower blood sugar levels
O Low blood pressure
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STEVIA INTERACTIONS
O Lithium interacts with SteviaO Medications for diabetes
(antidiabetes drugs) interacts with stevia
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CHEMICAL STRUCTURES OF
STEVIA MIXTURE.
April 8, 2023M.Kh.Aboghrip phytopathology 2013 18
April 8, 2023 M.Kh.Aboghrip phytopathology 2013 19
