Comparative Study between the Photosynthetic Parameters of Two Avocado (Persea americana) Cultivars Reveals Natural Variation in Light Reactions in Response to Frost Stress

Avocado is a commercially important fruit tree which sold worldwide. Originating in subtropical regions of the South America, this species now grown worldwide and sometimes exposed to cold temperatures. Specifically, frost stress harms crop yield its quality. While it known general that photosynthetic apparatus changes response conditions, there still not much information regarding sporadic stress. In study, we tracked apparatus’ light reaction ‘Hass’ ‘Ettinger’ avocado cultivars stress, with Ettinger being be more resilient than Hass. We found trees, occurs at level photosystem II (PSII) itself, rather photoprotective The Hass incorrectly interprets reduction electron transport rate activity by increases harvesting complex size expense centers then probability generate reactive oxygen species. results study open opportunities further research process regulates feedback mechanism controls unit’s when compared cultivar, whether part regulation from carbon assimilation step or indirectly stomatal limitation arises these corroborating past studies performed on avocados, suggests using advanced chlorophyll fluorescence protocols researching natural variation crops.