Polyamines: Small Amines with Large Effects on Plant Abiotic Stress Tolerance

In recent years, climate change has altered many ecosystems due to a combination of frequent droughts, irregular precipitation, increasingly salinized areas and high temperatures. These environmental changes have also caused a decline in crop yield worldwide. Therefore, there is an urgent need to fully understand the plant responses to abiotic stress and to apply the acquired knowledge to improve stress tolerance in crop plants. The accumulation of polyamines (PAs) in response to many abiotic stresses is one of the most remarkable plant metabolic responses. In this review, we provide an update about the most significant achievements improving plant tolerance to drought, salinity, low and high temperature stresses by exogenous application of PAs or genetic manipulation of endogenous PA levels. We also provide some clues about possible mechanisms underlying PA functions, as well as known cross-talks with other stress signaling pathways. Finally, we discuss about the possible use of PAs for seed priming to induce abiotic stress tolerance in agricultural valuable crop plants.

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Methyl Jasmonate and Brassinosteroids: Emerging Plant Growth Regulators in Plant Abiotic Stress Tolerance and Environmental Changes

Plant Growth Regulators ◽

10.1007/978-3-030-61153-8_8 ◽

2021 ◽

pp. 173-195

Author(s):

Haifa Abdulaziz S. Alhaithloul ◽

Mona H. Soliman

Keyword(s):

Abiotic Stress ◽

Plant Growth ◽

Methyl Jasmonate ◽

Stress Tolerance ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Environmental Changes ◽

Abiotic Stress Tolerance ◽

Plant Abiotic Stress

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The Role of Stress-Responsive Transcription Factors in Modulating Abiotic Stress Tolerance in Plants

Agronomy ◽

10.3390/agronomy10060788 ◽

2020 ◽

Vol 10 (6) ◽

pp. 788 ◽

Cited By ~ 4

Author(s):

Youngdae Yoon ◽

Deok Hyun Seo ◽

Hoyoon Shin ◽

Hui Jin Kim ◽

Chul Min Kim ◽

...

Keyword(s):

Transcription Factors ◽

Abiotic Stress ◽

Stress Tolerance ◽

Stress Responses ◽

Abiotic Stresses ◽

Crop Production ◽

Global Climate ◽

Abiotic Stress Tolerance ◽

Plant Responses ◽

Plant Tolerance

Abiotic stresses, such as drought, high temperature, and salinity, affect plant growth and productivity. Furthermore, global climate change may increase the frequency and severity of abiotic stresses, suggesting that development of varieties with improved stress tolerance is critical for future sustainable crop production. Improving stress tolerance requires a detailed understanding of the hormone signaling and transcriptional pathways involved in stress responses. Abscisic acid (ABA) and jasmonic acid (JA) are key stress-response hormones in plants, and some stress-responsive transcription factors such as ABFs and MYCs function as direct components of ABA and JA signaling, playing a pivotal role in plant tolerance to abiotic stress. In addition, extensive studies have identified other stress-responsive transcription factors belonging to the NAC, AP2/ERF, MYB, and WRKY families that mediate plant response and tolerance to abiotic stress. These suggest that transcriptional regulation of stress-responsive genes is an essential step to determine the mechanisms underlying plant stress responses and tolerance to abiotic stress, and that these transcription factors may be important targets for development of crops with enhanced abiotic stress tolerance. In this review, we briefly describe the mechanisms underlying plant abiotic stress responses, focusing on ABA and JA metabolism and signaling pathways. We then summarize the diverse array of transcription factors involved in plant responses to abiotic stress, while noting their potential applications for improvement of stress tolerance.

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Seed Priming: An Emerging Technology to Impart Abiotic Stress Tolerance in Crop Plants

Advances in Seed Priming ◽

10.1007/978-981-13-0032-5_3 ◽

2018 ◽

pp. 41-50 ◽

Cited By ~ 3

Author(s):

Shambhu Krishan Lal ◽

Sudhir Kumar ◽

Vijay Sheri ◽

Sahil Mehta ◽

Panditi Varakumar ◽

...

Keyword(s):

Abiotic Stress ◽

Stress Tolerance ◽

Abiotic Stress Tolerance ◽

Seed Priming ◽

Emerging Technology ◽

Crop Plants

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Allantoin: Emerging Role in Plant Abiotic Stress Tolerance

Plant Molecular Biology Reporter ◽

10.1007/s11105-021-01280-z ◽

2021 ◽

Author(s):

Harmeet Kaur ◽

Soni Chowrasia ◽

Vikram Singh Gaur ◽

Tapan Kumar Mondal

Keyword(s):

Abiotic Stress ◽

Stress Tolerance ◽

Abiotic Stress Tolerance ◽

Plant Abiotic Stress

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Potassium: A Vital Regulator of Plant Responses and Tolerance to Abiotic Stresses

Agronomy ◽

10.3390/agronomy8030031 ◽

2018 ◽

Vol 8 (3) ◽

pp. 31 ◽

Cited By ~ 73

Author(s):

Mirza Hasanuzzaman ◽

M. Bhuyan ◽

Kamrun Nahar ◽

Md. Hossain ◽

Jubayer Mahmud ◽

...

Keyword(s):

Abiotic Stress ◽

Stress Tolerance ◽

Molecular Mechanisms ◽

Abiotic Stress Tolerance ◽

Ion Homeostasis ◽

Enzyme Activation ◽

Regulatory Function ◽

Plant Responses ◽

Plant Structure ◽

Physiological Processes

Among the plant nutrients, potassium (K) is one of the vital elements required for plant growth and physiology. Potassium is not only a constituent of the plant structure but it also has a regulatory function in several biochemical processes related to protein synthesis, carbohydrate metabolism, and enzyme activation. Several physiological processes depend on K, such as stomatal regulation and photosynthesis. In recent decades, K was found to provide abiotic stress tolerance. Under salt stress, K helps to maintain ion homeostasis and to regulate the osmotic balance. Under drought stress conditions, K regulates stomatal opening and helps plants adapt to water deficits. Many reports support the notion that K enhances antioxidant defense in plants and therefore protects them from oxidative stress under various environmental adversities. In addition, this element provides some cellular signaling alone or in association with other signaling molecules and phytohormones. Although considerable progress has been made in understanding K-induced abiotic stress tolerance in plants, the exact molecular mechanisms of these protections are still under investigation. In this review, we summarized the recent literature on the biological functions of K, its uptake, its translocation, and its role in plant abiotic stress tolerance.

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