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Chapter 1 The importance of medicinal and aromatic plants for living things 33
1.10.1.1 India: Ayurveda and biodiversity conservation projects
India, with its rich biodiversity and traditional medicinal knowledge systems, is home
to successful projects for the conservation of MAPs. The Government of India, through
the National Medicinal Plants Board, is implementing various programs to protect medicinal plant reserves and promote sustainable harvesting methods. These projects aim
not only at the conservation of endemic species but also at the economic development
of farmers and communities. For example, organic cultivation and marketing of plants
used in Ayurveda has both increased the incomes of local farmers and met the demand
for these products on a global scale.
1.10.1.2 Brazil: sustainable collection projects in the Amazon forest
Brazil has developed various projects to protect the biodiversity of the Amazon forest and to utilize these resources sustainably. For example, the “ProNatura Project”
is an initiative that promotes the sustainable collection and processing of MAPs.
Within the scope of this project, local communities have been trained in the collection, processing, and sale of plants in international markets. At the same time, legal
regulations have been developed against overexploitation and protocols have been
established to ensure the use of these plants without harming nature.
1.10.1.3 Turkey: protection and production of endemic plants
Turkey is one of the countries with the richest plant diversity in the world and is of great
importance, especially in terms of endemic species. Within the scope of the “National Action Plan for Medicinal and Aromatic Plants,” the protection of medicinal plants and their
cultivation as cultivated plants are encouraged. For example, projects to grow plants such
as lavender, thyme, and sage in various regions of Anatolia have both protected natural
resources and revitalized the local economy. In addition, universities and research institutes have contributed to the development of new products in the health sector by investigating the active ingredients of these plants.
1.10.1.4 Africa: integration of local knowledge with modern practices
Many successful projects are being carried out on the African continent where traditional medicinal plants are integrated with modern science. Initiatives such as the “Traditional Healers’ Cooperative,” especially in South Africa, have protected the knowledge
of traditional healers and integrated this knowledge into modern health systems. The
34 Gamze Tüzün et al.
traditional knowledge of local people about medicinal plants has been included in modern drug development processes after undergoing scientific validation processes.
1.10.2 The bridge between traditional knowledge
and modern science
MAPs have held an important place in traditional knowledge systems for centuries and
have been used as a source of healing in many cultures. However, modern science offers
a unique platform for understanding the potential benefits of these plants more deeply
and in developing new therapeutic products. The bridge between traditional knowledge
and modern science plays a vital role in the preservation and sustainable use of these
plants.
1.10.2.1 Documentation and protection of traditional knowledge
Traditional knowledge is often transmitted through oral culture, which increases the
risk of its loss. Therefore, documenting the knowledge of local communities about medicinal plants is one of the most effective ways to ensure that this knowledge is passed
on to future generations. For example, projects supported by UNESCO have recorded
the knowledge of local communities in written form and made this information accessible for scientific research.
1.10.2.2 Scientific validation and application
Modern science offers various methods to test the validity and effectiveness of traditional knowledge. Laboratory studies analyze the chemical components of traditionally used plants to determine their pharmacological effects. For example, studies on
some plants used in Africa have proven that these plants have antibacterial, antiviral, and anticancer properties. This process allows traditional knowledge to be integrated into modern medical practices.
1.10.2.3 Education and awareness
Another important way to bridge the gap between traditional knowledge and modern
science is to increase education and awareness. Universities, research centers, and
civil society organizations organize educational programs on MAPs, bringing together
both traditional knowledge holders and scientists. Such collaborations encourage the
two different knowledge systems to work together and provide mutual benefits.
Chapter 1 The importance of medicinal and aromatic plants for living things 35
1.10.2.4 Patents and intellectual property rights
The use of traditional knowledge systems by modern science raises the issue of intellectual property rights. Scientific projects using traditional knowledge must provide
material and moral benefits to local communities. For this reason, many countries
have developed legal regulations for the patenting of products based on traditional
knowledge and the protection of the rights of local communities.
1.10.2.5 Public and private sector collaboration
Public and private sector collaboration provides an effective model for combining traditional knowledge with modern science. For example, pharmaceutical companies
are developing collaborations to integrate traditional knowledge obtained from local
communities into modern drug development processes. Such projects both stimulate
scientific innovation and contribute to the economic development of local communities.
1.11 Conclusions
MAPs have been an integral part of human life in many areas such as health, beauty,
food, and many others from the past to the present. These plants, which are the healing
treasures of nature, have not only been a part of traditional treatment methods, but have
also been integrated with modern science and technology to offer more effective and innovative solutions. MAPs have been examined over a wide range, from their chemical
structures to their pharmacological effects, and from their roles in daily life to sustainable
use strategies. By detailing the biological effects of active ingredients such as alkaloids,
flavonoids, and terpenoids, it sheds light on the interactions of these molecules with pharmacological targets. Studies on phytochemistry and identification of active compounds
reveal both the scientific and industrial potential of these plants. The role of aromatic
plants in daily life, their effects on health and well-being, and the variety and value of
their contributions to human life have been discussed in detail.
The protection and sustainable use of natural resources are of vital importance in
order to provide long-term benefits of these plants. Therefore, the protection of endangered species, the adoption of sustainable harvesting methods, and the implementation
of international legal regulations stand out as indispensable elements for the balance of
natural ecosystems and the preservation of biodiversity. Finally, the effects of climate
change and environmental stress factors on these plants increase the challenges and
risks that may be encountered in the future. However, genetic and biotechnological approaches hold promise for providing innovative solutions to these challenges. Regional
36 Gamze Tüzün et al.
success stories and the blending of traditional knowledge with modern science provide
inspiration for effective methods and collaboration models that can be applied in this
field.
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İrem Yıldız Özbaş✶, Severina Pacifico, and Emre Özbaş
Chapter 2
Methods of obtaining drugs from medicinal
and aromatic plants
Abstract: Many of the therapeutic agents we use today are plant-based, highlighting
the importance of medicinal and aromatic plants in drug discovery and the develop
ment of new drugs. The complex nature of plants and the challenges in effectively and
efficiently separating and purifying plant-based compounds have historically directed
scientists toward synthetic sources for drug development. However, recent advance
ments in technology and modern trends in drug discovery that integrate natural product development processes indicate that plants will continue to play a significant role in
this field in the future. Overcoming the challenges encountered at every stage of drug
development from plants requires an integrated interdisciplinary approach that lever
ages both traditional methods and technological advancements. A fast and efficient selection of source plants utilizing ethnopharmacological approaches, high-throughput
screening (HTS), and virtual screening methods, coupled with well-designed and bioac
tivity-guided extraction and isolation methods, advanced structural characterization
techniques, and the transfer of bioactive compounds in preclinical and clinical studies,
are essential steps for successful plant-based drug development. New analytical technol
ogies, combinatorial chemistry, computational and screening methods including artificial intelligence, molecular modeling, omics technologies for studying interactions between bioactive molecules and their targets, and the design of biological models
represent modern approaches that have demonstrated significant success in obtaining
drugs from medicinal and aromatic plants. These methods also hold substantial poten
tial for future research. This section provides an overview of the stages involved in obtaining drugs from medicinal and aromatic plants and the methods used at each stage.
It discusses traditional and modern methodologies in drug development, covering
source plant selection, bioactive compound extraction, isolation, characterization, bio
logical assays, clinical trials, new analog development, and optimization processes. Finally, the chapter evaluates future expectations for plant-based drug development in
light of emerging trends.
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✶
Corresponding author: İrem Yıldız Özbaş, Pharmacy Services Department, Aşık Veysel Vocational
School of Şarkışla, Sivas Cumhuriyet University, 58140 Sivas, Turkey, e-mail:
https://orcid.org/0000-0002-9657-9074
Severina Pacifico, Department of Environmental Biological and Pharmaceutical Sciences and
Technologies, University of Campania “Luigi Vanvitelli”, via Vivaldi 43, 81100 Caserta, Italy
Emre Özbaş, Medicinal and Aromatic Plants Programme, Plant and Animal Production Department,
Technical Sciences Vocational School of Sivas, Sivas Cumhuriyet University, 58140 Sivas, Turkey
irem@cumhuriyet.edu.tr,
42 İrem Yıldız Özbaş, Severina Pacifico, and Emre Özbaş
Keywords: medicinal and aromatic plants, bioactive compounds, natural products
drug discovery, plant-based drug development
2.1 Introduction
Plants and herbal products have been used in various ways against diseases since the
beginning of human existence. Plants and plant-based mixtures, known for their
lower potential to cause undesirable effects than synthetic drugs, ease of access, and
rich composition of active compounds, persist as a common choice among people
today, much like in the past. The number of plants used in treatments has steadily
increased, and recent studies have begun to establish the scientific foundations for
the role of plants in medicine [1].
Despite advancements in technology and accumulated knowledge, many diseases
worldwide still lack effective treatments, and for some, no curative drugs are currently available. Thus, the discovery of new drugs remains a critical necessity. Moreover, developing more effective and safer alternatives to existing medications for
treatable diseases is of paramount importance. Nature offers an immense reservoir
for drug discovery, containing countless compounds yet to be explored. Harnessing
the potential of natural products is essential in the course of identifying and developing new medicines [2].
Medicinal plants are rich resources that can be used to develop new drugs. Nearly
half of today’s medicines are plant-based. A significant portion of new drugs and active
pharmaceutical ingredients are either directly derived from plants or inspired by the
chemical structures of plant compounds [3, 4]. Naturally derived molecules from plants
that are physiologically bioactive can be used directly in treatment, while some are also
utilized as precursor molecules in the chemical synthesis or semisynthesis of drugs
[5]. The different therapeutic applications of natural compounds are shown in Figure 2.1
[6, 7]. Medicinal and aromatic plants, along with the natural products derived from
them and the drugs developed from these sources, exhibit a wide pharmacological spectrum of effects. They demonstrate therapeutic properties in the treatment of infections,
cancers, gastrointestinal disorders, respiratory, digestive, cardiovascular diseases, and
chronic conditions such as diabetes. Many of these plants share common properties,
including antioxidant, antimicrobial, and immunomodulatory effects, making them
valuable for prophylactic use as well. Among the most widely used drugs derived from
natural products globally are numerous examples of antibiotics, antifungals, cancer
chemotherapeutics, cholesterol-lowering agents, antihypertensives, and immunosuppressants [7].
Plants are organisms that display remarkable adaptation to their habitats. They
have developed a wide range of strategies to defend against potential threats and attacks from their environment. To defend against predators and environmental fac-