Abstract
ABSTRACT Three leaf maturity indices were defined as young, mature and senescence leaves. The effect of leaf phenophase resulted in a significant alteration in photosynthetic pigments, whereas site position had no significant effect on them. FPC values significantly increased along leaf phenophase development. TSP showed a sharp descending trend in the final phase of leaf elasticity. On the contrary, the highest TSS value was observed in senescence stage of leaf development. Such a trend was observed for starch content. The results revealed that FPC values significantly decreased along the elevation rise. RWC was significantly affected by both site position change and leaf phenophase factors, whereas ΨL was just significantly affected by leaf phenophase. The obtained results exhibited that leaf phenophase significantly affected six (F0, Fm, Fv/Fm, qP, NPQ, and ΦPSII) out of seven fluorescence variables. Meanwhile, the drastic effect of site position gradient was observed in F0, Fv/Fm, and qP. Severe decreases in leaf pigment variable values in SL are indicators of damage to chloroplasts due to leaf senescence and reduction of leaf moisture content, depicted through reducing leaf water potential. The FPC and TSS contents exhibited descending trends along site position gradients, which is consistent with the amount of rain and temperature. A remarkable reduction was observed in the values of Fv/Fm and Fm, ΦPSII and qP, suggesting the sufficiency of photochemistry transformation is affected by leaf cycle development, particularly in senescence stage.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.