0008889998

From Антэкология ⋮ Anthecology
Jump to: navigation, search
https://anthecology.org/a/0008889998##See official page of publication2019-12-06
СТАТЬЯ
Reproductive Biology of Lactoris fernandeziana (Lactoridaceae)Reproductive Biology of Lactoris fernandeziana (Lactoridaceae)
3
Bernardello G.
Автор антэкологических публикаций

, Anderson G.J.
5
Anderson G.J.
Автор антэкологических публикаций

, 
1
Lopez S. P.
Автор антэкологических публикаций

, 
1
Cleland M.A.
Автор антэкологических публикаций

, 
2
Stuessy T.F.
Автор антэкологических публикаций

, Crawford D.J.
2
Crawford D.J.
Автор антэкологических публикаций

See official publication page.American Journal of Botany
147
Журнал с антэкологическими публикациями.
Botanical Society of America · ajb@botany.org

, . V. 86. No. 6.
P. 829840 (12).
Lactoris fernandeziana, monotypic in its family, is endemic to the cloud forests of Robinson Crusoe Island. Although there has been considerable study of the relationships of Lactoris, as a rare species and as a putative primitive paleoherb, little is known of its reproductive biology. Knowledge of the latter is essential for effective conservation programs. The species is gynomonoecious. The overall proportion of flowers is ∼1 female:1 hermaphrodite. The inconspicuous semipendulous green flowers, usually in mixed-gender inflorescences, do not produce rewards. Hermaphrodite flowers are herkogamous and protogynous. Pollen grains are shed from the extrorse anthers in permanent dry tetrads. There is a mean of 12879 tetrads per hermaphrodite flower. Both flower types bear an average of ∼18 ovules. The P/O (pollen/ovule) ratios imply facultative or obligate xenogamy, but hand pollinations show that Lactoris is self-compatible. No floral visitors were ever observed, but stigmata of open-pollinated flowers bore tetrads, and 64% of such styles had pollen tubes. Flowers enclosed in large mesh (1 mm) bags bore similar numbers of tetrads and pollen tubes. Thus, we conclude that Lactoris is anemophilous, a syndrome perhaps reflected by the P/O ratio. Low genetic diversity (isozymes and DNA) supports selfing and implies limited distance wind pollen dispersal. The small size of the island, the ± 1000 extant Lactoris plants, coupled with anemophily, self-compatibility, and pendant flower position, have yielded a geitonogamous system with high seed set and low genetic diversity. If inbreeding depression is expressed, it is in seed germination and seedling vigor, for Lactoris is very difficult to cultivate. For this species, effective conservation practices need to focus on habitat preservation and promotion of outcrossing.
Похожие публикации
Oriani A.
1
Oriani A.
Автор антэкологических публикаций

, Scatena V.L.
2
Scatena V.L.
Автор антэкологических публикаций

Reproductive biology of Abolboda pulchella and A. poarchon (Xyridaceae: Poales) // Annals of Botany
515
Журнал с антэкологическими публикациями.
Oxford University Press · office@annbot.com

. 2011. V. 107. No. 4. P. 611–619. AID: 9876565433. Статья
1
Patrick K.L.
Автор антэкологических публикаций

, 
31
Johnson S.D.
Автор антэкологических публикаций

, 
1
Duffy K.J.
Автор антэкологических публикаций

High levels of fecundity in small and isolated populations of a self‐compatible Aloe pollinated by opportunistic birds and bees // Plant Biology
4
Журнал с антэкологическими публикациями.

. 2018. V. 20. No. 4. P. 780–788. AID: 8547854444. Статья
8
Ackerman J.D.
Автор антэкологических публикаций

Abiotic Pollen and Pollination: Ecological, Functional, and Evolutionary Perspectives // Plant Systematics and Evolution
49
Журнал с антэкологическими публикациями.
Springer Science+Business Media

. 2000. V. 222. No. 1. P. 167–185. AID: 7865434567. Статья
8
Kremen C.
Автор антэкологических публикаций

et al. Pollination and other ecosystem services produced by mobile organisms: a conceptual framework for the effects of land‐use change // Ecology Letters
68
Журнал с антэкологическими публикациями.
Wiley-Blackwell

. 2007. V. 10. No. 4. P. 299–314. AID: 7678114788. Статья
Liu J.-X.
1
Liu J.-X.
Автор антэкологических публикаций

et al. Microsporogenesis, microgametogenesis, and pollen morphology of Ambrosia artemisiifolia L. in China // Plant Systematics and Evolution
49
Журнал с антэкологическими публикациями.
Springer Science+Business Media

. 2012. V. 298. No. 1. P. 43–50. AID: 6732378456. Статья
Rusterholz H.-P.
4
Rusterholz H.-P.
Автор антэкологических публикаций

, Baur B.
1
Baur B.
Автор антэкологических публикаций

Delayed response in a plant–pollinator system to experimental grassland fragmentation // Oecologia
344
Журнал с антэкологическими публикациями.
Springer

. 2010. V. 163. No. 1. P. 141–152. AID: 6577794447. Статья
Cázares-Martínez J.
1
Cázares-Martínez J.
Автор антэкологических публикаций

, Montaña C.
1
Montaña C.
Автор антэкологических публикаций

, Franco M.
1
Franco M.
Автор антэкологических публикаций

The role of pollen limitation on the coexistence of two dioecious, wind-pollinated, closely related shrubs in a fluctuating environment // Oecologia
344
Журнал с антэкологическими публикациями.
Springer

. 2010. V. 164. No. 3. P. 679–687. AID: 6577744456. Статья
Mooney K.A.
1
Mooney K.A.
Автор антэкологических публикаций

, Linhart Y.B.
3
Linhart Y.B.
Автор антэкологических публикаций

, Snyder M.A.
1
Snyder M.A.
Автор антэкологических публикаций

Masting in ponderosa pine: comparisons of pollen and seed over space and time // Oecologia
344
Журнал с антэкологическими публикациями.
Springer

. 2011. V. 165. No. 3. P. 651–661. AID: 6574444429. Статья
Больше информации в настольной версии.