Photochemical performance of reproductive structures in Great Basin bunchgrasses in response to soil-water availability.

ABSTRACT: Active restoration, especially seeding, is necessary in sagebrush steppe rangelands degraded by the spread and dominance of exotic invasive annual grasses, in part due to low, episodic seed production of native perennial bunchgrasses. In contrast, the widespread exotic bunchgrass, crested wheatgrass, readily produces viable seed cohorts. How soil-water availability affects the ecophysiology of the reproductive structures that may underlie these differences are unclear. To address this, we measured pre- and post-anthesis chlorophyll fluorescence parameters of optimal (F _v/F _m) and light-adapted PSII quantum yield (ϕ _PSII) and ϕ _PSII-derived electron transport rate (ETR) response to photosynthetic photon flux density (PPFD) in seed he

SUBMITTER: Hamerlynck EP 

PROVIDER: S-EPMC8739650 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature