Photosystem II quantum yield as a measure of radical scavengers in chilling injury in cucumber fruits and bell peppers

Planta ◽  
1994 ◽  
Vol 194 (4) ◽  
pp. 478-486 ◽  
Author(s):  
L. M. M. Tijskens ◽  
E. C. Otma ◽  
O. van Kooten
Keyword(s):  
Quantum Yield ◽  
Photosystem Ii ◽  
Chilling Injury ◽  
Radical Scavengers ◽  
Bell Peppers ◽  
Photosystem Ii Quantum Yield

Stalk rot resistant sorghum genotypes are resilient to pathogen-mediated photosystem II quantum yield retardation

2019 ◽  
Vol 124 ◽  
pp. 104852 ◽  
Author(s):  
Ananda Y. Bandara ◽  
Dilooshi K. Weerasooriya ◽  
Tesfaye T. Tesso ◽  
Christopher R. Little
Keyword(s):  
Quantum Yield ◽  
Photosystem Ii ◽  
Stalk Rot ◽  
Sorghum Genotypes ◽  
Photosystem Ii Quantum Yield

scholarly journals Determining Chilling Injury Induction in Green Peppers Using Nondestructive Pulse Amplitude Modulated (PAM) Fluorometry

1994 ◽  
Vol 119 (1) ◽  
pp. 59-62 ◽  
Author(s):  
Susan Lurie ◽  
Reuven Ronen ◽  
Shimon Meier
Keyword(s):  
Quantum Yield ◽  
Tissue Damage ◽  
Chilling Injury ◽  
Pulse Amplitude ◽  
Nonphotochemical Quenching ◽  
Photochemical Quenching ◽  
Pam Fluorometry ◽  
Bell Peppers ◽  
Storage Temperatures ◽  
Potassium Leakage

Storing `Maor' green bell peppers (Capsicum annuum L.) for 3 weeks at 2C resulted in the development of chilling injury (CI) evidenced as surface pitting. Fruit held at 8C did not develop any CI symptoms, but, after 3 weeks of storage, the fruit began to change color from green to red. PAM fluorometry was used to measure changes in photosynthetic competency in whole green bell peppers. Three photosynthetic characteristics could be measured by this method: quantum yield (Fm/Fe), photochemical quenching (Qp), and nonphotochemical quenching (Qnp). Fm/Fo decreased 90% during the first week of storage at 2C and remained low thereafter, while Qnp decreased after 2 weeks at 2C, just before the peppers began to develop CL Qp was similar at both storage temperatures. Potassium leakage as a CI measurement also increased in excised pepper discs after 2 weeks at 2C. The results indicate that PAM fluorometry can measure CI nondestructively before tissue damage is visible in green peppers.

Delayed fluorescence, steady state fluorescence, photosystem II quantum yield as endpoints for toxicity evaluation of Cu2+ and Ag+

2016 ◽  
Vol 130 ◽  
pp. 174-180 ◽  
Author(s):  
Sebastian M. Strauch ◽  
Peter R. Richter ◽  
Ferdinand W.M. Haag ◽  
Marcus Krüger ◽  
Julia Krüger ◽  
...  
Keyword(s):  
Steady State ◽  
Quantum Yield ◽  
Photosystem Ii ◽  
Delayed Fluorescence ◽  
Toxicity Evaluation ◽  
Steady State Fluorescence ◽  
Photosystem Ii Quantum Yield
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