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Bitter Gourd and Antidiabetics: Phytochemical diversity and variation among germplasm, commercial lines and as affected by planting season, ripening stage and storage length R.-Y. Yang 1 , Y.-L. Tien 1 , P. Hanson 1 , N. Dhillon 1 and D. Ledesma 1 , C.-Y. Hung 2 , Y.-M. Chung 2 and M.-L. Cheng 2 , M.-S. Shiao 2 , M. Pathak 3 , W. Easdown 4 , and T. Omvir Singh 4 1 AVRDC – The World Vegetable Center, Shanhua, Tainan, Taiwan 2 Institute of Biomedical Sciences, Chang Gung University, Taoyuan, Taiwan 3 Department of Vegetable Crops, Punjab Agricultural University, India 4 AVRDC – The World Vegetable Center, Hyderabad, India Bitter Gourd Conference Hyderabad, India 20-21 March 2014

Transcript of Bitter Gourd and Antidiabeticsksiconnect.icrisat.org/wp-content/uploads/2014/05/Ray...Bitter Gourd...

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Bitter Gourd and Antidiabetics:

Phytochemical diversity and variation among germplasm, commercial lines and as affected by

planting season, ripening stage and storage length

R.-Y. Yang1, Y.-L. Tien1, P. Hanson1, N. Dhillon1 and D. Ledesma1, C.-Y. Hung2, Y.-M. Chung2 and M.-L. Cheng2, M.-S. Shiao2,

M. Pathak3, W. Easdown4, and T. Omvir Singh4

1AVRDC – The World Vegetable Center, Shanhua, Tainan, Taiwan

2Institute of Biomedical Sciences, Chang Gung University, Taoyuan, Taiwan 3Department of Vegetable Crops, Punjab Agricultural University, India

4AVRDC – The World Vegetable Center, Hyderabad, India

Bitter Gourd Conference Hyderabad, India

20-21 March 2014

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Outline

• Bitter gourd- a vegetable and medicinal plant

• Primary and secondary antidiabetic effects

• Antidiabetic compounds

• Phytochemical diversity and variation: – In selected germplasm accessions

– In selected commercial varieties

– As affected by ripening stage

– As affected by storage length

– As affected by planting season

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Bitter gourd • A vegetable

– Popular in India, China, the Philippines, Taiwan, and Japan

– Consumed worldwide, particularly in Chinese and India communities

• A medicinal plant

– Anti-hyperglycemia

– Anti-hyperlipidemia

– Anti-oxidation

– Anti-inflammation

– Anti-microbial pathogens

Source of photos: AVRDC

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Primary effect of anti-diabetics

• Plasma glucose homeostasis

– Decrease carbohydrate digestion & absorption

– Increase insulin secretion

– Increase hepatic glucose utilization

– Increase insulin sensitivity in liver & muscle cells

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Secondary effects of anti-diabetics

• Reduce inflammation

• Anti-oxidation and reduce/delay oxidative stress

• Increase fatty acid utilization

• Lower blood lipids

• Reduce pre-fat cell proliferation

• Broad-spectrum anti-microbial activity

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Anti-hyperglycemic substances in bitter gourd

Saponin fraction

Lipid fraction

Water fraction

Steroid and triterpenoid saponins

•Momordicine I, II, III •Momordicosides Q, R, S, T •Momordicosides A, D, E, F2, I, K, L •Kuguacin A,…, S •Charantin •Cucurbitan B, K… •……

Alkaloids

•Vicine •…

Lipids

•c9, t11 conjugated linoleic acid •c9, t11, t13 conjugated linolenic acid . a- Eleostearic acid -……

Proteins

•p-Insulin-like •v-Insulin-like •Lectin •Mormodin I, II…. •……

Source: literature review, AT, AVRDC

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Cucurbitane-type triterpenoids Momordicosides

Q: b-D-glucopyranosyl , H

R: b-D-allopyranosyl, b-D-glucopyranosyl

S: b-D-glucopyranosyl , b-D-glucopyranosyl

T: b-D-xylopyranosyl, b-D-glucopyranosyl

Kuguacin

I : R1,R2: H

II,III :H, b-D-glucopyranosyl

Momordicine

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Cucurbitane-type steroid saponins

b-D-GLC

Sitosterol glucosides Stigmastadienol glucosides

b-D-GLC

4 4

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Fatty acids

15,16-dihydroxy-a-eleostearic acid

c9, t11 conjugated linoleic acid (C18:2)

c9, t11, t13 conjugated linolenic acid (C18:3) (a-eleostearic acid)

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2014/3/21 10

Proteins

P-Insulin-like V-Insulin-like Lectin Momordin

11 kDa 11 kDa 120 kDa 27.41 kDa

17 amino acids

17 amino acids

547 amino acids

250 amino acids

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Bitter Gourd Project

• Goal

– Improved income and quality of life of diabetics in developing countries

• Objectives

– Optimize production of anti-diabetic compounds in bitter gourd through varietal selection, postharvest practices, and preparation methods

– Develop evidence-based dietary strategies using bitter gourd to reduce hyperglycemia (high blood sugar) in type 2 diabetic populations in Asia and Africa

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Commercial variety Field and location Harvest/ maturity Postharvest Food preparation Animal Human

Co

nte

nt, stab

ility and

effect o

f p

hyto

nu

trien

ts in b

itter go

urd

Germplasm

Evidence-based agricultural and dietary strategies for the production and use of bitter gourd for anti-hyperglycemic control

Project approach

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Project partners and study sites

AVRDC-HQ

AVRDC-ESEA

AVRDC-RCSA

KCMC AVRDC-RCA

PAU

NTU

JLU

AUW

Project planning workshop, 3-6 May 2011, AVRDC

PAU: Punjab Agricultural Univ. AUW: Avinashilingam Univ. for Women KCMC: Kilimanjaro Christian Medical Center JLU: Justus-Liebig Giessen University NTU: National Taiwan University

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Germplasm evaluation • Location

– AVRDC-HQ, Taiwan

• Plant materials

– AVRDC GRSU

• Exp design:

– RCBD, 3 rep, 8 plants/rep

– 2 years

• Evaluation:

– Horticultural traits

– Antidiabetic compounds

– LC/MS profile fingerprints

Source of photos: N Dhillon, AVRDC-ESEA

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LCMS profile of bitter gourd

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NS1020

Time1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00 16.00 17.00 18.00 19.00 20.00

%

0

100

20130827_NS01 1: TOF MS ES+ BPI

9.65e3

0.59305.109

15.07778.540

9.48496.344

8.00518.327

7.72518.336

5.33476.244

1.63188.072

0.68120.078

2.19529.207

3.451046.803

3.38;455.346 4.43739.4273.82

814.500

7.19523.341

6.27523.341

5.65419.328

6.54437.338

8.84520.343

8.57520.345

8.92523.342

15.05954.608

9.50496.339

11.13524.371

9.88522.355

14.64149.021

11.22353.264

12.02279.230 14.11

568.427

13.78611.467

12.89593.278

15.10778.544

16.43684.54115.65

792.565

16.88782.566

18.45663.45516.91

782.567

16.94782.568

18.43663.463

18.48663.456

15

16

2

1

12

10, 14 11

9

5

6

4

3 13 8

7

16 compounds identified - 7 phosphatidylcholines, 2 fatty acid derivatives (PKG1) - 5 triterpenoids (PKG2) -1 alkaloid glycoside (PKG3) - 1 amino acid

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16 16

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Anti-hyperglycemic substances in bitter gourd

Saponin fraction

Lipid fraction

Water fraction

Steroid and triterpenoid saponins

•Momordicine I, II, III •Momordicosides Q, R, S, T •Momordicosides A, D, E, F2, I, K, L •Kuguacin A,…, S •Charantin •Cucurbitan B, K… •……

Alkaloids

•Vicine •…

Lipids

•c9, t11 conjugated linoleic acid •c9, t11, t13 conjugated linolenic acid . a- Eleostearic acid -……

Proteins

•p-Insulin-like •v-Insulin-like •Lectin •Mormodin I, II…. •……

Source: literature review, AT, AVRDC

PKG1

PKG2 PKG3

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Germplasm trial at AVRDC, Taiwan - Group means, content ranges and the top/bottom 3

accessions

PKG1 PKG2 PKG3 2011 2012 2011 2012 2011 2012

Range 30-60 30-68 0.2 - 9.4 0.2-13.9 29-95 25-103 Top 3 TOT4009 TOT4009 TOT5869 TOT4009 THMC155 THMC155

THMC232 THMC195 THMC193 THMC195 THMC168 THMC168 THMC155 TOT4785 TOT4131 TOT4785 TOT4370 TOT4370

Bottom 3 TOT5869 TOT1398 TOT1568 TOT1398 TOT1568 TOT4785 TOT1398 TOT3991 TOT4009 TOT3991 TOT1567 TOT1568 THMC168 THMC232 TOT3991 THMC232 TOT5869 TOT5869

0

20

40

60

80

100

PKG1 PKG2 PKG3

inte

nsi

ty (

E6)

2011

2012

Root mean squared error

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Commercial variety multilocation trials

Genotype-Environment Interactions • Plant materials:

– 20 commercial seed company hybrids

• Design: – RCBD, 3 rep, 8-10 plants/rep, 2 years

• Four locations: – Taiwan: AVRDC-HQ, Tainan

– South India: AVRDC-RCSA, Hyderabad

– North India: Punjab Agricultural University, Ludhiana

– Tanzania: AVRDC-RCA, Arusha

• Evaluation: – Horticultural traits

– Anti-diabetic constituents

– LC/MS fingerprints

AVRDC-HQ AVRDC-RCSA

AVRDC-RCA

PAU

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Commercial variety trial at AVRDC, Taiwan – ANOVA of PKG1-3 by year and drying method

0

20

40

60

80

100

PKG1 PKG2 PKG3

2011-FD

2012-FD

2011-OD

2012-OD

PK1 PK2 PK3 2011 2012 2011 2012 2011 2012

Replication <.0001 0.1071 <.0001 ns 0.0049 <.0001 Variety 0.0005 0.0001 <.0001 <.0001 <.0001 <.0001 Drying <.0001 <.0001 <.0001 0.0002 <.0001 <.0001 V x D ns ns ns ns ns ns

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PKG1 PKG2 PKG3

2011 2012 2011 2012 2011 2012

Freeze dried

Range 28-61 23-53 0.5-13.6 0.9-14.5 51-102 37-97

Top 3 VNR28 Benteng545 NS1024 NS1024 VNR28 NS1020

Amanshri NewMoon BGCT725 BGCT725 NS1020 VNR28

THMC195 THMC195 PreetiITC Amanshri NewMoon PreetiITC

Bottom 3 Zeena BGCT725 JadeDragon JadeDragon JadeDragon I-Taj4625

HighMoon Jasper Jasper HighMoon BGCT385 JadeDragon

Abhishek HighMoon HighMoon Jasper HighMoon BGCT358

Hot air oven dried

Range 24-39 15-31 0.7-16.0 0.7-13.2 53-107 28-89

Top 3 THMC199 THMC199 NS1024 NS1024 VNR28 VNR28

Benteng545 Zeena BGCT725 PreetiITC NewMoon NS1020

Palee THMC195 ARBHT-1 US33 ARBHT-1 NewMoon

Bottom 3 NS1020 NS1020 JadeDragon JadeDragon BGCT385 BGCT358

HighMoon BGCT385 Jasper Jasper HighMoon HighMoon

Abhishek HighMoon HighMoon HighMoon JadeDragon JadeDragon

Commercial variety trial at AVRDC, Taiwan – Content range and the top /bottom 3 varieties

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PKG1 PKG2 PKG3 2011 2012 2011 2012 2011 2012

6.2-14.8 1.7-8.8 0.9-18.7 0.2-5.9 3.7-21.3 1.4-26.8 Top 3 BGCT358 NS1024 VNR28 JDragon ARBHT-1 NewMoon

NS1020 BGCT725 NewMoon Ben545 NS1024 VNR28

Jasper US33 Preeti Jasper US33 NS1020

Bottom 3 US33 BGCT358 JDragon HighMoon Jasper BGCT725

BGCT385 JDragon Jasper US33 JDragon Palee

NS1024 Jasper BGCT358 ARBHT-1 HighMoon JDragon

Commercial variety trial at PAU, north India – Content range and the top /bottom 3 varieties

0

5

10

15

20

25

PKG1 PKG2 PKG3

inte

nsi

ty (

10

E6)

2011

2012

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Commercial variety trial at AVRDC, Hyderabad – Content range and the top /bottom 3 varieties

PKG1 PKG2 PKG3

2011 2012 2011 2012 2011 2012

Ranges 16-30 19-37 1.6-17.5 2.4-18.2 5-68 6-80

Top 3 BGCT725 Ben545 Amanshri NS451 VNR28 VNR28

Ben545 JDragon NS1024 BGCT725 NS1020 NS1020

HighMoon HighMoon Zeena NS1024 NS451 NewMoon

Bottom 3 VNR28 ARBHT-1 JDragon JDragon HighMoon BGCT358

Preeti BGCT725 Jasper Jasper Ben545 Ben545

Zeena VNR28 HighMoon HighMoon BGCT358 JDragon

0

10

20

30

40

50

PKG1 PKG2 PKG3

inte

nsi

ty (

E+6

)

2011

2012

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Commercial variety trial at AVRDC-Arusha Content range and the top /bottom 3 varieties

PKG1 PKG2 PKG3 Ranges 21-39 4-19 17-56 Top 3 Jasper NS1020 VNR28

Palee NS451 NS1020 BGCT358 Zeena NewMoon

Bottom 3 US33 JDragon Zeena Zeena Jasper Abhishek

BGCT725 HighMoon BGCT385

0

10

20

30

40

PKG1 PKG2 PKG3

inte

nsi

ty (

E+6

)

2011

2012

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Content ranges of bitter gourd germplasm and commercial variety trials

Trial location D PKG1 PKG2 PKG3

2011 2012 2011 2012 2011 2012 Germplasm

(25) s Taiwan FD 30-60 30-68 0.2-9 0.2-14 29-95 25-103

Commercial (23)

s Taiwan FD 28-61 23-53 1-14 1-15 51-102 37-97

Commercial (23)

s Taiwan OD 24-39 15-31 1-16 1-13 53-107 28-89

Commercial (20)

n India OD 6-15 2-9 1-19 0.2-6 4-21 1-27

Commercial (20)

s India OD 16-30 19-37 2-18 2-18 5-68 6-80

Commercial (20)

n Tanzania OD 21-39 4-19 17-56

D: drying method; FD: freeze drying; OD: hot air oven drying

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Postharvest study

• Three varieties: NS1020, US22, Palee

• Planting year: 2013

• Treatments:

– 3 harvest dates (16-, 18- 20- day after flowering)

– 2 drying methods (freeze dried, hot air oven dried)

– 3 storage length (0, 1, 2, days)

• Analysis: LCMS, selected nutrients

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Bioactive compounds of NS1020 as affected by fruit ripening stage and drying method

0

20

40

60

80

100

120

PK1 PK2 PK3 PK1 PK2 PK3 PK1 PK2 PK3

16 day 18 day 20 day

Inte

nsi

ty (

E+6

)

Freeze dry Oven dry

0

20

40

60

80

100

120

PK1 PK2 PK3

16 day

18 day

20 day

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Bioactive compounds as affected by storage time length

0

20

40

60

80

100

120

PK1 PK2 PK3 PK1 PK2 PK3

16 Day 18 Day

Inte

nsi

ty (

E+6

)

NS1020

S-0 day

S-1 day

S-2 day

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Nutrient contents of NS1020 by fruit ripening stage and drying method

0

2

4

6

8

10

12

16 Day 18 Day 20 Day

Dry matter

Freeze dry

Oven dry

0.00

0.20

0.40

0.60

0.80

1.00

1.20

16 Day 18 Day 20 Day

Carotenoids

Freeze dry

Oven dry

0

20

40

60

80

100

120

16 Day 18 Day 20 Day

Vitamin C

Freeze dry

Oven dry

0

200

400

600

800

1000

1200

16 Day 18 Day 20 Day

Antioxidant Activity

Freeze dry

Oven dry

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Nutrient contents of NS1020 as affected by storage length

0

2

4

6

8

10

12

16 Day 18 Day

Dry matter

S-0 day

S-1 day

S-2 day

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

16 Day 18 Day

Carotenoids

S-0 day

S-1 day

S-2 day

0

20

40

60

80

100

16 Day 18 Day

Vitamin C

S-0 day

S-1 day

S-2 day

0

200

400

600

800

1000

1200

1400

16 Day 18 Day

Antioxidant Activity

S-0 day

S-1 day

S-2 day

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Compounds affected by planting seasons

• Two varieties: green, white

• Design: RCBD, 3 rep, 2 years, 3 seasons

• Location: AVRDC-Taiwan

• LCMS profiling: UPLC-TOF-MS

• Analysis: Metabolomics - pattern recognition

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Spring Winter

Summer

The PCA score plot of green bitter gourd grown in different seasons

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powder 27

Time1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 11.00 12.00 13.00 14.00 15.00

%

0

100

6

4 5 7

3

2 8

12 22

11 14

10

18 25

17

16

13

15

29

26 23

21

20

19 24

30

28

27

1 9

Fig. Base peak chromatogram of of M. charantia (NO 76, spring)

The 30 most affected metabolites were identified: -Amino acids -Alkaloids -Fatty acids -Lysophosphatidylcholines -Lysophosphatidylethanols -Triterpenoids

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Conclusions

• Varietal differences were found for all three compound groups (fatty acids, triterpenoids, alkaloids).

• Among germplasm, variation within fatty acids, triterpenoids, and alkaloid were 4-fold, 10-70-fold, 3-fold, respectively.

• Magnitudes of variation within fatty acids, triterpenoids, and alkaloid were similar for commercial varieties.

• Opportunities exist to improve all three compound groups, especially triterpenoids.

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Conclusions

• Longer storage led to decreased fatty acids and vitamin C contents, and increased carotenoids and antioxidant activities, but not triterpenoids and alkaloids

• Metabolite types and amounts in bitter gourd fruits were affected by seasons. The 30 most affected metabolites were identified and belonged to the groups of amino acids, alkaloids, fatty acids, lysophosphatidylcholines, lysophosphatidylethanols, and triterpenoids