Bio-Priming of Seeds: Plant Stress management and its Underlying Cellular, Biochemical and Molecular Mechanisms

Abstract Autophagy is a conserved recycling process in which cellular components are delivered to and degraded in the vacuole/lysosome for reuse. In plants, it assists in responding to dynamic environmental conditions and maintaining metabolite homeostasis under normal or stress conditions. Under stress, autophagy is activated to remove damaged components and to recycle nutrients for survival, and the energy sensor kinases target of rapamycin (TOR) and SNF-related kinase 1 (SnRK1) are key to this activation. Here, we discuss accumulating evidence that hormone signaling plays critical roles in regulating autophagy and plant stress responses, although the molecular mechanisms by which this occurs are often not clear. Several hormones have been shown to regulate TOR activity during stress, in turn controlling autophagy. Hormone signaling can also regulate autophagy gene expression, while, reciprocally, autophagy can regulate hormone synthesis and signaling pathways. We highlight how the interplay between major energy sensors, plant hormones, and autophagy under abiotic and biotic stress conditions can assist in plant stress tolerance.

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Genome-wide identification and expression analysis of glycine-rich protein genes in Chinese cabbage (Brassica rapa L. ssp. pekinensis)

10.21203/rs.2.17461/v1 ◽

2019 ◽

Author(s):

Xiaonan Lu ◽

Ming Gao ◽

Yaxiong Cheng ◽

Meilan Li ◽

Xiaoyong XU

Keyword(s):

Low Temperature ◽

Chinese Cabbage ◽

Molecular Mechanisms ◽

Plant Stress ◽

Evolutionary Relationship ◽

Soft Rot ◽

Biotic And Abiotic Stress ◽

Motif Analysis ◽

Abnormal Expression ◽

Glycine Rich Protein

Abstract Background Plant Glycine-rich proteins, a superfamily with a glycine-rich domain, play an important role in various stress such as low temperature, drought, high salt, and so on. Although the research of GRP genes has been reported in many plants, the GRP gene has seldom reported in Chinese cabbage so far. Research results made a guide to further understand the function of BrGRP genes in Chinese cabbage. Results In this study, a total of 141 glycine-rich protein genes were identified in Chinese cabbage by homology comparative analysis. A further prediction of physical and chemical characteristics revealed that 58.3% of BrGRPs were alkalines, 63.1% of BrGRPs were unstable, and 73.8% were hydrophilic. Conserved domain analysis showed that 110 BrGRPs contained 18 same conserved motifs, and could be classified into five main subclasses which the evolutionary relationship and gene structure may be conserved while the other 31 BrGRPs, including Bra014168 , Bra040002 , etc, may gain new functions or gradually lost gene functions according to the evolution process. These identified BrGRP genes were also located in ten chromosomes and three different subgenomes of Chinese cabbage, and 101 pairs of orthologous GRP genes were found between Chinese cabbage and Arabidopsis. According to the opened transcriptome data, we found that 138 BrGRP genes showed abnormal expression at high temperature, 108 BrGRP genes showed abnormal expression at low temperature, and 74 at drought stress, 47 at soft rot stress, while only 3 and 7 genes at ozone and salt stress, respectively. Further promoter motif analysis found that a large number of stress-related cis-acting elements, such as DRE, MYC, MYB, and ABRE, were identified in their promoter regions, which were in correspondence with previous differential expression. In addition, some BrGRP genes were involved in multiple stresses suggested their broad-spectrum resistance. Conclusion A total of 141 GRP genes were identified in Chinese cabbage, which suggested their potential roles in plant stress response. But the molecular mechanisms by which BrGRP genes respond and resist biotic and abiotic stress remain unclear. These results may provide an important basis for the study of their function in Chinese cabbage.

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CELLULAR AND MOLECULAR MECHANISMS CONTROLLING AUTOPHAGY: A PERSPECTIVE TO IMPROVE PLANT STRESS RESISTANCE AND CROP PRODUCTIVITY

Sel skokhozyaistvennaya Biologiya ◽

10.15389/agrobiology.2018.5.881eng ◽

2018 ◽

Vol 53 (5) ◽

pp. 881-896 ◽

Cited By ~ 1

Author(s):

C.K. Rabadanova ◽

◽

E.V. Tyutereva ◽

V.S. Mackievic ◽

V.V. Demidchik ◽

...

Keyword(s):

Stress Resistance ◽

Molecular Mechanisms ◽

Plant Stress ◽

Crop Productivity

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Bioactive Molecules from Bacillus spp.: An Effective Tool for Plant Stress Management

Bioactive Molecules in Plant Defense ◽

10.1007/978-3-030-27165-7_1 ◽

2019 ◽

pp. 1-23

Author(s):

S. Nakkeeran ◽

S. Vinodkumar ◽

P. Renukadevi ◽

S. Rajamanickam ◽

Sudisha Jogaiah

Keyword(s):

Stress Management ◽

Plant Stress ◽

Bioactive Molecules ◽

Bacillus Spp

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Transcriptional Factors Regulate Plant Stress Responses Through Mediating Secondary Metabolism

Genes ◽

10.3390/genes11040346 ◽

2020 ◽

Vol 11 (4) ◽

pp. 346 ◽

Cited By ~ 7

Author(s):

Tehseen Ahmad Meraj ◽

Jingye Fu ◽

Muhammad Ali Raza ◽

Chenying Zhu ◽

Qinqin Shen ◽

...

Keyword(s):

Secondary Metabolism ◽

Stress Responses ◽

Molecular Mechanisms ◽

Plant Stress ◽

Defense Responses ◽

Stress Sensitivity ◽

Transcriptional Factors ◽

Stress Factors ◽

Defense Gene Expression ◽

Signaling Crosstalk

Plants are adapted to sense numerous stress stimuli and mount efficient defense responses by directing intricate signaling pathways. They respond to undesirable circumstances to produce stress-inducible phytochemicals that play indispensable roles in plant immunity. Extensive studies have been made to elucidate the underpinnings of defensive molecular mechanisms in various plant species. Transcriptional factors (TFs) are involved in plant defense regulations through acting as mediators by perceiving stress signals and directing downstream defense gene expression. The cross interactions of TFs and stress signaling crosstalk are decisive in determining accumulation of defense metabolites. Here, we collected the major TFs that are efficient in stress responses through regulating secondary metabolism for the direct cessation of stress factors. We focused on six major TF families including AP2/ERF, WRKY, bHLH, bZIP, MYB, and NAC. This review is the compilation of studies where researches were conducted to explore the roles of TFs in stress responses and the contribution of secondary metabolites in combating stress influences. Modulation of these TFs at transcriptional and post-transcriptional levels can facilitate molecular breeding and genetic improvement of crop plants regarding stress sensitivity and response through production of defensive compounds.

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PLANT STRESS MANAGEMENT IN SEMIARID GREENHOUSE

Acta Horticulturae ◽

10.17660/actahortic.2008.797.28 ◽

2008 ◽

pp. 205-215 ◽

Cited By ~ 3

Author(s):

S. De Pascale ◽

A. Maggio

Keyword(s):

Stress Management ◽

Plant Stress

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Omics and approaches in plant stress management

Microbial Management of Plant Stresses ◽

10.1016/b978-0-323-85193-0.00003-6 ◽

2021 ◽

pp. 107-117

Author(s):

Dharmendra Kumar ◽

Subhesh Saurabh Jha ◽

Ajay Kumar ◽

Sandeep Kumar Singh

Keyword(s):

Stress Management ◽

Plant Stress

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Molecular Mechanisms for the Reaction Between•OH Radicals and Proline: Insights on the Role as Reactive Oxygen Species Scavenger in Plant Stress

The Journal of Physical Chemistry B ◽

10.1021/jp407773u ◽

2013 ◽

Vol 118 (1) ◽

pp. 37-47 ◽

Cited By ~ 73

Author(s):

Santiago Signorelli ◽

E. Laura Coitiño ◽

Omar Borsani ◽

Jorge Monza

Keyword(s):

Reactive Oxygen Species ◽

Molecular Mechanisms ◽

Plant Stress ◽

Reactive Oxygen ◽

Oh Radicals ◽

Oxygen Species ◽

Reactive Oxygen Species Scavenger

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Nitrate Reductase-Mediated Nitric Oxide Regulates the Leaf Shape in Arabidopsis by Mediating the Homeostasis of Reactive Oxygen Species

International Journal of Molecular Sciences ◽

10.3390/ijms20092235 ◽

2019 ◽

Vol 20 (9) ◽

pp. 2235 ◽

Cited By ~ 9

Author(s):

Qiao-Na Pan ◽

Chen-Chen Geng ◽

Dan-Dan Li ◽

Shi-Wen Xu ◽

Dan-Dan Mao ◽

...

Keyword(s):

Nitric Oxide ◽

Reactive Oxygen Species ◽

Stress Responses ◽

Leaf Development ◽

Molecular Mechanisms ◽

Leaf Shape ◽

Plant Stress ◽

Reactive Oxygen ◽

Oxygen Species ◽

Signaling Molecule

As a gaseous biological signaling molecule, nitric oxide (NO) regulates many physiological processes in plants. Over the last decades, this low molecular weight compound has been identified as a key signaling molecule to regulate plant stress responses, and also plays an important role in plant development. However, elucidation of the molecular mechanisms for NO in leaf development has so far been limited due to a lack of mutant resources. Here, we employed the NO-deficient mutant nia1nia2 to examine the role of NO in leaf development. We have found that nia1nia2 mutant plants displayed very different leaf phenotypes as compared to wild type Col-0. Further studies have shown that reactive oxygen species (ROS) levels are higher in nia1nia2 mutant plants. Interestingly, ROS-related enzymes ascorbate peroxidase (APX), catalases (CAT), and peroxidases (POD) have shown decreases in their activities. Our transcriptome data have revealed that the ROS synthesis gene RBOHD was enhanced in nia1nia2 mutants and the photosynthesis-related pathway was impaired, which suggests that NO is required for chloroplast development and leaf development. Together, these results imply that NO plays a significant role in plant leaf development by regulating ROS homeostasis.

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