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Eco. Env. & Cons. 26 (November Suppl. Issue) : 2020; pp. (S248-S251)
Copyright@ EM International
ISSN 0971–765X
Microgreens: Exciting new food for 21st Century
Shashank Sharma, Priyanka Dhingra1 and Sameer Koranne2
Department of Chemistry, School of Basics & Applied Sciences, Galgotias University,
Greater Noida, India
1Department of Chemistry, JECRC University, Jaipur, India
2School of Hospitality, Galgotias University, Greater Noida, India
(Received 23 April, 2020; Accepted 26 May, 2020)
ABSTRACT
Micro greens are emerging group of eatables vegetables grown when initial leaves have completely grown
and just prior to true leaves begin to emerge. This concept is attaining people’s interest as a new cooking
and edible properties. These are added to increase flavors and nutritional value of raw veggies or as eatable
toppings to decorate a large number of other food items. Main class of micro greens are raised generally
from cabbage, mustard, buckwheat, radish, spinach, lettuce, etc. Day by day demand of micro greens has
been increasing, due to presence of enormous number of biologically active compounds like essential
vitamins, minerals and antioxidants as compare to fully grown greens(necessary for healthiness). This paper
is aimed to give an overview on the nutritional facts, their comparison with sprouts, potential bioactive
compounds and cultivation, harvesting and marketing of microgreens along with their future perspective.
Key words: Microgreens, Biologically active compounds.
What are micro greens?
In the course of 20 years, growing awareness of
mass people in healthy meal has encouraged atten-
tion in fresh, functional and nutraceutical foods of
high end. It is in the favor of micro green crop cul-
tivators, extension experts and scientists to meet
coming opportunities for relevant products.
Micro greens, commonly termed as ‘Vegetable
Confetti’, are another form of distinction crop, por-
trayed as soft juvenile greens raised from the seeds
of grains, vegetables, or herbs as well as its wild
types. Since, in developed countries attraction to-
wards healthy eating, gourmet cooking and indoor
gardening has been increased and thereby
microgreens have now attained recognition there.
This new form of food has a comparatively small
life span even in refrigerator and are utilised in very
little amounts as garnishes, toppings, or seasonings
(Riggio et al., 2019).
Micro greens are identified by various number
of colors, tastes, textures and are fresh and tenderly
soft vegetables, found from the seeds of abundant
varieties (aromatic herbs vegetables, wild edible
plants, and herbaceous plants), harvested a few
days or weeks after germination during the forma-
tion of cotyledons and appearance of the first true
leaves (Paradiso et al., 2018).
Micro greens have larger concentrations of phe-
nolics, antioxidants, minerals, and vitamins than
present in fully developed green or seeds and hence
recognized as functional foods consisting of health
improving or ailment prevention characteristics
apart from their nutritional benefits. These are well
recognize as good carrier of biologically active com-
ponents (Mir et al., 2017).
Unfortunately, commercialization of micro
greens is less due to their speedy degradation and a
very small storage life, generally 3 to 5 days at en-
SHARMA ET AL S249
compassing temperature, so these are supposed to
be highly decomposable products. As the demand
for micro greens rises, consequently their appear-
ance in farmer’s markets and specialty on grocery
stores also begins, so the improvement of their bun-
dling and post collect stockpiling circumstances is
in this way getting significant for upgraded
timeframe of realistic usability (Mir et al., 2017).
Varieties of micro greens
Since the stock and consumption of micro greens is
greatly affected by occurring of culinary trends and
selectivity of species depends on maker’s discussion
with chefs and on customer adaptation with their
specific sensory characteristics. Microgreens might
be dispersed as new cut items yet in addition while
developing on media, to be gathered by end clients.
Species related to the families Brassicaceae,
Asteraceae, Chenopodiaceae, Lamiaceae, Apiaceae,
Amarillydaceae, Amaranthceae and Cucurbitaceae
are mostly exploited. Bioactive substance is con-
spicuous in types of rather harsh taste (for example
Brassicaceae), the variable adequacy of which war-
rants distinguishing proof of genotypes that may
take into account requests for both taste and
wellbeing (Xiao, Lester et al., 2012).
Microgreens can be obtained from different sorts
of seeds. The well known species are harvested us-
ing seeds from the following plant families (View &
Club, 2019) :
Brassicaceae family: Broccoli, cauliflower, water-
cress, cabbage, arugula and radish
Asteraceae family: Endive, lettuce, radicchio, and
chicory
Apiaceae family: Carrot, dill, celery, and fennel
Amaryllidaceae family: Onion, leek, and garlic
Amaranthaceae family: Quinoa swiss chard, ama-
ranth, spinach, and beet
Cucurbitaceae family:, cucumber, squash and
melon
Cereals such as rice, oats, wheat, corn and barley,
as well as legumes like chickpeas, beans and lentils,
are also sometimes grown into micro greens. Micro
greens may differ in flavor that can vary from plain
to spiced, tangy or even bitter, considering type of
green. Basically, their flavor is supposed to be
strong and concentrated. (View and Club, 2019).
(a) Bioactive components
Bio active amount is usually described in less edible
micro greens varieties like sorrel (Rumex acetosa L.),
peppercress (Lepidium bonariense L.), red cabbage
(Brassica oleracea L. var. capitata) and also in few
varieties of more acceptable flavor like amaranth
(Amaranthus hypochondriacus L.) and cilantro
(Coriandrum sativum L.) (Xiao et al., 2012).
The list of verified human bio active compounds
consists of carotenoids (,violaxanthin, -carotene
and lutein/zeaxanthin), ascorbic acid (free, total and
dehydro), tocopherols(- and -tocopherol), and
phylloquinone.
b) Nutritional Details
Microgreens are full of nutritional sources. While
their concentration may vary in less amounts, many
types are rich K, Fe, Zn, Mg and Cu (Xiao et al.,
2016). Micro greens are good resource of significant
plant compounds like antioxidants (Xiao et al.,
2012). In addition to this, their nutritional value is
concentrated, indicating higher vitamins, mineral
and antioxidants amount than the same quantity of
mature greens (Xiao et al., 2012). Researchers have
shown that level of nutrients in micro greens are up
to nine times greater than those found in mature
greens (Pinto et al., 2015).
The utmost concentrations of ascorbic acid, caro-
tenoids, phylloquinone, and tocopherols are found
in red cabbage, cilantro, garnet amaranth, and green
daikon radish micro greens respectively along with
various bioactive components and significantly
higher in micro greens while comparing with data
base values for fully grown vegetable counterparts
(Xiao et al., 2012). However, this early small scale
green research was carried out with restriction be-
cause the developing conditions, post cultivation
conditions, and extraction techniques for the fully
grown vegetables were unclear. As compare to da-
tabase values, experimental data introduces uncer-
tainties if we consider significant impacts of light
wavelength and intensity on phytonutrients con-
tent. For instance, looking at information from head-
framing fully grown vegetables for which just the
peripheral leaves are accessible to light is question-
able according to the micro green type of the veg-
etable (Xiao et al., 2012).
Researches also reported that micro greens pos-
sess antioxidants and a number of polyphenols as
contrast to their fully grown vegetable counterparts
(Bull, 2008). According to one report, in 25
microgreen varieties which are commercially avail-
able, vitamins and antioxidant concentrations were
found. While comparing these values with the
S250 Eco. Env. & Cons. 26 (November Suppl. Issue) : 2020
USDA National Nutrient Database for fully grown
vegetable leaves, vitamin and antioxidant values
varied and it was approximated that values mea-
sured in microgreens were up to 40 times more than
those reported for fully grown vegetable leaves
(Xiao et al., 2012).
Microgreens Vs Sprouts
Microgreens might be generally misconcepted for
grown seeds (sprouts), which have been regularly
concerned in food-borne disease although,
microgreens possess some characteristic similarities
with freshly herbs (e.g, basil, thyme, and cilantro),
petite greens (e.g, baby spinach and spring mix) and
sprouts. Many research studies discussed about
nutrition and physiological properties of
microgreens but since 2009 a very few have reports
particularly examined the food safety hazards of
microgreens whereas worldwide studies have been
carried out in order to explore leafy green and
sprout safety (Riggio et al., 2019).
Microgreens and sprouts are consumed in imma-
ture condition however they are distinct with each
other (Treadwell et al., 2013). Sprouts are mainly
grown-up in dark environment of moisture where
ready to microbial proliferation and their use differ-
ent from of micro- and baby-greens has been ap-
plied in outbreaks of food borne epidemics. Also,
micro greens are having wide range of leaf color,
shape and varieties and greater taste increasing
properties than sprouts. Many recent reports sug-
gested that the nitrate content in microgreens is
lower than that in fully grown vegetable leaves, fur-
ther they also have higher amounts of minerals (Ca,
Mg, Fe, Mn, Zn, Se and Mo) and phytonutrients
(ascorbic acid, b-carotene, a-tocopherol and phyllo-
quinone) (Xiao et al., 2012).
Health Benefits of Micro greens
Since the amount of vitamins, minerals and benefi-
cial plant compounds are high in microgreens so
eating green vegetables is associated to decrease
danger of many diseases (Bazzano et al., 2002;
Carter et al., 2010). Microgreens are also blessed
with such vital nutrients to protect us from diseases.
Heart disease: Microgreens have great content of
antioxidants e.g. polyphenols which can reduce the
risk heart disease. As per different animal studies it
is clear that microgreens may lower down the level
of triglyceride and “bad” LDL cholesterol (Huang et
al., 2016; Tangney and Rasmussen, 2013).
Alzheimer’s disease: Antioxidant-rich foods, in-
cluding polyphenols, can decrease probability of
memory related disease such as Alzheimer (Guest
and Grant, 2016).
Diabetes: Presence of antioxidants can facilitate to
lower risk of type 2 diabetes. In laboratory experi-
ments, fenugreek microgreens are supposed to in-
crease cellular sugar uptake by 25–44% (M.H., 1996;
Wadhawan et al., 2018).
Certain type of cancers: Antioxidant-rich fruits and
vegetables particularly containing polyphenols,
may decrease danger of different kinds of cancer
(Zhou et al., 2016).
Future Perspective of these microgreens
Most of the microgreen analysis and studies are
carried out at comparatively small level and is lim-
ited to only few number of researchers with limited
targeted areas. There is scope of broad range of area
yet to be explored. Moreover some of the varieties of
microgreens have been studied and analyzed, but
many of them have not been put for commercializa-
tion. The influence of sun light on microgreens de-
velopment and nutrition has been precisely taken
care off whereas the effect of low night tempera-
tures on plant development, nutritional level, and
food risks of microgreens has not been analysed.
Prevention and treatment methods should be iden-
tified for microgreens because they are beneficial
but maintaining quality and safety of microgreens is
still in its earliest stages. It has been established that
post harvest light treatments can increase the forma-
tion bioactive elements, but this was not properly
analyzed to apply on broad range of microgreens. It
is an issue of discussion that phytonutrient sub-
stance could give innate protection from quality and
wellbeing issues. Identification of many post culti-
vation treatments have been carried out time to time
to keep quality and to extend life span of
microgreens. For the production of ready-to-eat
microgreen products, washing and drying methods
should be more focused. It is especially significant
that to put more and more research into ensuring
the safety and quality of this new addition to
healthy diets so that the food industry could resolve
some of the problems that have created challenges
for the fully grown vegetables.
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