The photosynthetic performance of sterile and fertile sporophytes in a natural population of the fern Dryopteris affinis

Title:

The photosynthetic performance of sterile and fertile sporophytes in a natural population of the fern Dryopteris affinis

Creator:

Paoli, L. and Landi, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:128e4b19-4adb-4534-9453-af4b6475a9ae
uuid:128e4b19-4adb-4534-9453-af4b6475a9ae
issn:0300-3604
doi:10.1007/s11099-013-0022-5

Subject:

botanika, botany, chlorophyll fluorescence induction, JIP-test, Mediterranean area, performance index, photosynthesis, pteridophytes, 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

We studied the photosynthetic performance of sterile and fertile sporophytes in a natural population of the fern Dryopteris affinis growing within a riparian forest (Central Italy) using chlorophyll (Chl) a fluorescence transients, the OJIP phase, where O is for the minimum fluorescence, P is for the peak (the maximum), and J and I are inflections. The “vitality” of the samples was assessed by the maximum quantum yield of primary photochemistry obtained indirectly from the fluorescence data (Fv/Fm); in the same way, the so-called performance index (PIABS) was obtained from fluorescence data. The photosynthetic performance (inferred from PIABS) of D. affinis changed significantly with the seasonal development of the fronds. The highest photosynthetic performance was recorded in the summer, corresponding to the period of spore release. The photosynthetic performance decreased in the winter, down to the minimal values of senescent fronds reached at the end of the seasonal cycle (May-June). On the whole, during the seasonal development, sterile and fertile fronds had a similar photosynthetic behaviour, as inferred from fluorescence data. At the end of spore maturation and dispersal (September-October), the fertile fronds showed somewhat lower photosynthetic performance than the sterile fronds, as revealed by PIABS. Being a long-lived fern, confined to humid and undisturbed sites in the Mediterranean, D. affinis deserves to be further investigated as a potential indicator of ecological continuity in Mediterranean riparian forests., L. Paoli, M. Landi., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

312-316

Source:

Photosynthetica | 2013 Volume:51 | Number:2

Harvested from:

CDK

Metadata only:

false