scholarly journals Photosystem II Extrinsic Proteins and Their Putative Role in Abiotic Stress Tolerance in Higher Plants

Plants ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 100 ◽  
Author(s):  
Shina Sasi ◽  
Jelli Venkatesh ◽  
Rawya Daneshi ◽  
Mayank Gururani
Keyword(s):  
Abiotic Stress ◽  
Photosystem Ii ◽  
Functional Role ◽  
Higher Plants ◽  
Abiotic Stress Tolerance ◽  
Repair System ◽  
Physiological Conditions ◽  
Extrinsic Proteins ◽  
Photosynthetic Machinery

Abiotic stress remains one of the major challenges in managing and preventing crop loss. Photosystem II (PSII), being the most susceptible component of the photosynthetic machinery, has been studied in great detail over many years. However, much of the emphasis has been placed on intrinsic proteins, particularly with respect to their involvement in the repair of PSII-associated damage. PSII extrinsic proteins include PsbO, PsbP, PsbQ, and PsbR in higher plants, and these are required for oxygen evolution under physiological conditions. Changes in extrinsic protein expression have been reported to either drastically change PSII efficiency or change the PSII repair system. This review discusses the functional role of these proteins in plants and indicates potential areas of further study concerning these proteins.

scholarly journals Functional Role of the Cytoplasmic Tail Domain of the Major Envelope Fusion Protein of Group II Baculoviruses

2006 ◽  
Vol 80 (22) ◽  
pp. 11226-11234 ◽  
Author(s):  
Gang Long ◽  
Xiaoyu Pan ◽  
Marcel Westenberg ◽  
Just M. Vlak
Keyword(s):  
Fusion Proteins ◽  
Functional Role ◽  
Cytoplasmic Tail ◽  
Viral Envelope ◽  
Repair System ◽  
Dependent Manner ◽  
Tail Domain ◽  
F Protein ◽  
Group Ii

ABSTRACT F proteins from baculovirus nucleopolyhedrovirus (NPV) group II members are the major budded virus (BV) viral envelope fusion proteins. They undergo furin-like proteolysis processing in order to be functional. F proteins from different baculovirus species have a long cytoplasmic tail domain (CTD), ranging from 48 (Spodoptera litura multicapsid NPV [MNPV]) to 78 (Adoxophyes honmai NPV) amino acid (aa) residues, with a nonassigned function. This CTD is much longer than the CTD of GP64-like envelope fusion proteins (7 aa), which appear to be nonessential for BV infectivity. Here we have investigated the functional role of the CTD of Helicoverpa armigera single-capsid NPV (HearNPV), a group II NPV. We combined a newly constructed HearNPV f-null bacmid knockout-repair system and an Autographa californica MNPV (AcMNPV) gp64-null bacmid knockout-pseudotype system with mutation and rescue experiments to study the functional role of the baculovirus F protein CTD. We show that except for the 16 C-terminal aa, the HearNPV F CTD is essential for virus spread from cell to cell. In addition, the CTD of HearNPV F is involved in BV production in a length-dependent manner and is essential for BV infectivity. The tyrosine residue Y658, located 16 aa from the C terminus, seems to be critical. However, HearNPV F without a CTD still rescues the infectivity of gp64-null AcMNPV BV, indicating that the CTD is not involved in processing and fusogenicity. Altogether, our results indicate that the F protein is essential for baculovirus BV infectivity and that the CTD is important for F protein incorporation into BV.

Role of Nitric Oxide in Plant Abiotic Stress Tolerance

2020 ◽  
pp. 131-154
Author(s):  
Gábor Feigl ◽  
Árpád Molnár ◽  
Dóra Oláh ◽  
Zsuzsanna Kolbert
Keyword(s):  
Nitric Oxide ◽  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Plant Abiotic Stress

Role of Calcium in Conferring Abiotic Stress Tolerance

2019 ◽  
pp. 205-218
Author(s):  
Muhammad Naeem ◽  
Misbah Amir ◽  
Hamid Manzoor ◽  
Sumaira Rasul ◽  
Habib-ur-Rehman Athar
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance

Role of reactive oxygen species in the regulation of abiotic stress tolerance in legumes

2021 ◽  
pp. 217-243
Author(s):  
Ashutosh Sharma ◽  
Pooja Sharma ◽  
Rahul Kumar ◽  
Vikas Sharma ◽  
Renu Bhardwaj ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Reactive Oxygen ◽  
Oxygen Species
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