Role of Nonpathogenic Fungi in Inducing Systemic Resistance in Crop Plants Against Phytopathogens

2016 ◽  
pp. 69-83 ◽  
Author(s):  
Shachi Singh
Keyword(s):  
Crop Plants ◽  
Systemic Resistance

scholarly journals Beyond Arabidopsis: BBX Regulators in Crop Plants

2021 ◽  
Vol 22 (6) ◽  
pp. 2906
Author(s):  
Urszula Talar ◽  
Agnieszka Kiełbowicz-Matuk
Keyword(s):  
Stress Tolerance ◽  
Crop Plants ◽  
Abiotic Stress Response ◽  
Biotic And Abiotic Stress ◽  
Photoperiodic Regulation ◽  
Large Families ◽  
Stress Related Genes ◽  
Unique Domain ◽  
Clock Mechanism

B-box proteins represent diverse zinc finger transcription factors and regulators forming large families in various plants. A unique domain structure defines them—besides the highly conserved B-box domains, some B-box (BBX) proteins also possess CCT domain and VP motif. Based on the presence of these specific domains, they are mostly classified into five structural groups. The particular members widely differ in structure and fulfill distinct functions in regulating plant growth and development, including seedling photomorphogenesis, the anthocyanins biosynthesis, photoperiodic regulation of flowering, and hormonal pathways. Several BBX proteins are additionally involved in biotic and abiotic stress response. Overexpression of some BBX genes stimulates various stress-related genes and enhanced tolerance to different stresses. Moreover, there is evidence of interplay between B-box and the circadian clock mechanism. This review highlights the role of BBX proteins as a part of a broad regulatory network in crop plants, considering their participation in development, physiology, defense, and environmental constraints. A description is also provided of how various BBX regulators involved in stress tolerance were applied in genetic engineering to obtain stress tolerance in transgenic crops.

scholarly journals dl-β-Aminobutyric Acid–Induced Resistance of Potato Against Phytophthora infestans Requires Salicylic Acid but Not Oxylipins

2010 ◽  
Vol 23 (5) ◽  
pp. 585-592 ◽  
Author(s):  
Lennart Eschen-Lippold ◽  
Simone Altmann ◽  
Sabine Rosahl
Keyword(s):  
Salicylic Acid ◽  
Phytophthora Infestans ◽  
Induced Resistance ◽  
Crop Plants ◽  
Aminobutyric Acid ◽  
Systemic Resistance ◽  
Lipoxygenase Pathway ◽  
Promising Alternative ◽  
Functional Analyses ◽  
Late Blight Pathogen

Inducing systemic resistance responses in crop plants is a promising alternative way of disease management. To understand the underlying signaling events leading to induced resistance, functional analyses of plants defective in defined signaling pathway steps are required. We used potato, one of the economically most-important crop plants worldwide, to examine systemic resistance against the devastating late blight pathogen Phytophthora infestans, induced by treatment with dl-β-aminobutyric acid (BABA). Transgenic plants impaired in either the 9-lipoxygenase pathway, which produces defense-related compounds, or the 13-lipoxygenase pathway, which generates jasmonic acid–derived signals, expressed wild-type levels of BABA-induced resistance. Plants incapable of accumulating salicylic acid (SA), on the other hand, failed to mount this type of induced resistance. Consistently, treatment of these plants with the SA analog 2,6-dichloroisonicotinic acid restored BABA-induced resistance. Together, these results demonstrate the indispensability of a functional SA pathway for systemic resistance in potato induced by BABA.

Effect of plant systemic resistance and role of type III secretion system in colonization of basil and lettuce by Salmonella enterica

2015 ◽  
Author(s):  
Shulamit Manulis ◽  
Maria Brandl ◽  
Isaac Barash ◽  
Laura Chalupowicz ◽  
Michael McClelland ◽  
...  
Keyword(s):  
Type Iii Secretion ◽  
Salmonella Enterica ◽  
Type Iii Secretion System ◽  
Secretion System ◽  
Systemic Resistance ◽  
Type Iii

scholarly journals Relaxin induces rapid, transient vasodilation in the microcirculation of hamster skeletal muscle

2013 ◽  
Vol 218 (2) ◽  
pp. 179-191 ◽  
Author(s):  
Jordan M Willcox ◽  
Alastair J S Summerlee ◽  
Coral L Murrant
Keyword(s):  
Skeletal Muscle ◽  
Gap Junction ◽  
Fourth Order ◽  
Peripheral Resistance ◽  
Second Order ◽  
Systemic Resistance ◽  
Transient Nature ◽  
Channel Dependent ◽  
Synthase Inhibitor

Relaxin produces a sustained decrease in total peripheral resistance, but the effects of relaxin on skeletal muscle arterioles, an important contributor to systemic resistance, are unknown. Using the intact, blood-perfused hamster cremaster muscle preparationin situ, we tested the effects of relaxin on skeletal muscle arteriolar microvasculature by applying 10−10 M relaxin to second-, third- and fourth-order arterioles and capillaries. The mechanisms responsible for relaxin-induced dilations were explored by applying 10−10 M relaxin to second-order arterioles in the presence of 10−5 M N(G)-nitro-l-arginine methyl ester (l-NAME, nitric oxide (NO) synthase inhibitor), 10−5 M glibenclamide (GLIB, ATP-dependent potassium (K+) channel inhibitor), 10−3 M tetraethylammonium (TEA) or 10−7 M iberiotoxin (IBTX, calcium-associated K+channel inhibitor). Relaxin caused second- (peak change in diameter: 8.3±1.7 μm) and third (4.5±1.1 μm)-order arterioles to vasodilate transiently while fourth-order arterioles did not (0.01±0.04 μm). Relaxin-induced vasodilations were significantly inhibited byl-NAME, GLIB, TEA and IBTX. Relaxin stimulated capillaries to induce a vasodilation in upstream fourth-order arterioles (2.1±0.3 μm), indicating that relaxin can induce conducted responses vasodilation that travels through blood vessel walls via gap junctions. We confirmed gap junction involvement by showing that gap junction uncouplers (18-β-glycyrrhetinic acid (40×10−6 M) or 0.07% halothane) inhibited upstream vasodilations to localised relaxin stimulation of second-order arterioles. Therefore, relaxin produces transient NO- and K+channel-dependent vasodilations in skeletal muscle arterioles and stimulates capillaries to initiate conducted responses. The transient nature of the arteriolar dilation brings into question the role of skeletal muscle vascular beds in generating the sustained systemic haemodynamic effects induced by relaxin.

scholarly journals Induction of Osmoregulation and Modulation of Salt Stress inAcacia gerrardiiBenth. by Arbuscular Mycorrhizal Fungi andBacillus subtilis(BERA 71)

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Abeer Hashem ◽  
E. F. Abd_Allah ◽  
A. A. Alqarawi ◽  
A. A. Al-Huqail ◽  
M. A. Shah
Keyword(s):  
Salt Stress ◽  
Arbuscular Mycorrhizal Fungi ◽  
Glycine Betaine ◽  
Mycorrhizal Fungi ◽  
Plant Stress ◽  
Arbuscular Mycorrhizal ◽  
Systemic Resistance ◽  
Plant Growth Promoting ◽  
Acacia Gerrardii

The role of soil microbiota in plant stress management, though speculated a lot, is still far from being completely understood. We conducted a greenhouse experiment to examine synergistic impact of plant growth promoting rhizobacterium,Bacillus subtilis(BERA 71), and arbuscular mycorrhizal fungi (AMF) (Claroideoglomus etunicatum;Rhizophagus intraradices; andFunneliformis mosseae) to induce acquired systemic resistance in Talh tree (Acacia gerrardiiBenth.) against adverse impact of salt stress. Compared to the control, the BERA 71 treatment significantly enhanced root colonization intensity by AMF, in both presence and absence of salt. We also found positive synergistic interaction betweenB.subtilisand AMFvis-a-visimprovement in the nutritional value in terms of increase in total lipids, phenols, and fiber content. The AMF and BERA 71 inoculated plants showed increased content of osmoprotectants such as glycine, betaine, and proline, though lipid peroxidation was reduced probably as a mechanism of salt tolerance. Furthermore, the application of bioinoculants to Talh tree turned out to be potentially beneficial in ameliorating the deleterious impact of salinity on plant metabolism, probably by modulating the osmoregulatory system (glycine betaine, proline, and phenols) and antioxidant enzymes system (SOD, CAT, POD, GR, APX, DHAR, MDAHR, and GSNOR).

Induction of systemic resistance by plant growth promoting rhizobacteria in crop plants against pests and diseases

2001 ◽  
Vol 20 (1) ◽  
pp. 1-11 ◽  
Author(s):  
V Ramamoorthy ◽  
R Viswanathan ◽  
T Raguchander ◽  
V Prakasam ◽  
R Samiyappan
Keyword(s):  
Plant Growth ◽  
Plant Growth Promoting Rhizobacteria ◽  
Crop Plants ◽  
Systemic Resistance ◽  
Pests And Diseases ◽  
Plant Growth Promoting ◽  
Growth Promoting

scholarly journals The role of ethylene in rhizobacteria-induced systemic resistance (ISR)

2007 ◽  
pp. 325-331 ◽  
Author(s):  
C. M. J. Pieterse ◽  
S. Van Der Ent ◽  
J. A. Van Pelt ◽  
L. C. Van Loon
Keyword(s):  
Induced Systemic Resistance ◽  
Systemic Resistance
Sign in / Sign up

Export Citation Format

Share Document