Life History Studies of Conopholis americana (Orobanchaceae)

Baird, W. V.; Riopel, James L.

doi:10.2307/2425946

Cited by 21 publications

(23 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, interpretations of interspecies differences should be used with caution. Additionally, the parasitic plants are perennials with a subterranean plant body (Baird & Riopel, 1986). Therefore, it is possible that stored C from the subterranean plant body, fixed before the 1999 pulse, was used in the growth of the flowering stalk.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Use of stored carbon reserves in growth of temperate tree roots and leaf buds: analyses using radiocarbon measurements and modeling

Gaudinski

Torn

Riley

et al. 2009

Global Change Biology

View full text Add to dashboard Cite

Characterizing the use of carbon (C) reserves in trees is important for understanding regional and global C cycles, stress responses, asynchrony between photosynthetic activity and growth demand, and isotopic exchanges in studies of tree physiology and ecosystem C cycling. Using an inadvertent, whole-ecosystem radiocarbon ( 14 C) release in a temperate deciduous oak forest and numerical modeling, we estimated that the mean age of stored C used to grow both leaf buds and new roots is 0.7 y and about 55% of new root growth annually comes from stored C. Therefore, the resultant mean age of C used to grow new root tissue is ~0.4 y. In short, new roots contain a lot of stored C but it is young in age. Additionally, the type of structure used to model stored C input is important. Model structures that did not include storage, or that assumed stored and new C mixed well (within root or shoot tissues) before being used for root growth, did not fit the data nearly as well as when a distinct storage pool was used.Consistent with these whole-ecosystem labeling results, the mean age of C in new-roottissues determined using "bomb-14 C" in three additional forest sites in North America and Europe (one deciduous, two coniferous) was less than 1-2 y. The effect of stored reserves on estimated ages of fine roots is unlikely to be large in most natural abundance isotope studies.However, models of root carbon dynamics should take stored reserves into account, particularly for pulse labeling studies and fast-cycling roots (< 1 y).2

show abstract

Section: Resultsmentioning

confidence: 99%

“…Samples were kept cool and transported to the laboratory, where they were dried (50 °C for a minimum of 48 h) and ground. Squaw root is associated only with trees of the genus Quercus (Baird & Riopel, 1986).…”

mentioning

confidence: 99%

Use of stored carbon reserves in growth of temperate tree roots and leaf buds: analyses using radiocarbon measurements and modeling

Gaudinski

Torn

Riley

et al. 2009

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…As suggested by Baird and Riopel (1986a), Sattler (1988), Mauseth et al (1992), and Hsiao et al (1994), it may be useful to avoid thinking in terms of separate organ types such as ''roots'' and ''stems'' when dealing with highly modified structures like the Hydnora vegetative body. Sattler (1988) and Lehmann and Sattler (1992) point out that homeosis (transference of features) in plants generates novelty through the rearrangement of existing parts that can result in ''hybrid'' structures.…”

Section: Discussionmentioning

confidence: 99%

Structural attributes of the hypogeous holoparasite Hydnora triceps Drège & Meyer (Hydnoraceae)

Tennakoon

Bolin

Musselman

et al. 2007

American J of Botany

View full text Add to dashboard Cite

The morphology of the hypogeous root holoparasite Hydnora triceps is highly reduced, and as with many holoparasites, the vegetative body is difficult to interpret. The vegetative body of H. triceps has been historically considered a "pilot root" studded with lateral appendages known as "haustorial roots." We found the vegetative body of H. triceps to consist of a rhizome with a thickened root-cap-like structure that covered a vegetative shoot apical meristem. From the apical meristem, procambial strands originated and developed into endarch collateral vascular bundles arranged radially around a pith without an interfascicular cambium. Xylem vessels had scalariform pitting and simple perforation plates. A continuous periderm without root hairs was observed. Increase in girth was attributed to cork and fascicular cambia. "Haustorial roots" or bumps on the surface of the vegetative body were exogenous, contained meristems and were the origins of vegetative branching, budding, and haustoria. The haustoria of H. triceps were cylindrical and penetrated the host root stele. Phloem and xylem elements were observed within the endophyte, and direct xylem to host-xylem contacts were observed. The arrangement of vascular tissues and xylem anatomy of H. triceps are likely plesiomorphic features in light of Hydnoraceae's placement in the Piperales.

show abstract

“…Considering the broad array of plants in the diet of white-tailed deer, and high deer densities in many parts of their range (Halls 1984), many additional plant species are undoubtedly dispersed as well. Other species that have been reported from feces of white-tailed deer are Conopholis americana, a parasitic herb on oak roots (Baird and Riopel 1985), the wetland herb Ranunculus scleratus (Campbell and Gibson 2001), honey mesquite, Prosopis glandulosa (Kramp et al 1998), and two species of Opuntia cactus (Gonzalez-Espinosa and Quintana-Ascencio 1986). Janzen (1985) documented white-tailed deer in Costa Rica dispersing large numbers of viable seeds of Spondias mombin, but not by defecation; deer regurgitated the 20-mm hard endocarps intact.…”

Section: Discussionmentioning

confidence: 99%

Seed dispersal by white-tailed deer: implications for long-distance dispersal, invasion, and migration of plants in eastern North America

et al. 2004

View full text Add to dashboard Cite

For many plant species in eastern North America, short observed seed dispersal distances (ranging up to a few tens of meters) fail to explain rapid rates of invasion and migration. This discrepancy points to a substantial gap in our knowledge of the mechanisms by which seeds are dispersed long distances. We investigated the potential for white-tailed deer ( Odocoileus virginianus Zimm.), the dominant large herbivore in much of eastern North America, to disperse seeds via endozoochory. This is the first comprehensive study of seed dispersal by white-tailed deer, despite a vast body of research on other aspects of their ecology. More than 70 plant species germinated from deer feces collected over a 1-year period in central New York State, USA. Viable seeds included native and alien herbs, shrubs, and trees, including several invasive introduced species, from the full range of habitat types in the local flora. A mean of >30 seeds germinated per fecal pellet group, and seeds were dispersed during all months of the year. A wide variety of presumed dispersal modes were represented (endo- and exozoochory, wind, ballistic, ant, and unassisted). The majority were species with small-seeded fruits having no obvious adaptations for dispersal, underscoring the difficulty of inferring dispersal ability from diaspore morphology. Due to their broad diet, wide-ranging movements, and relatively long gut retention times, white-tailed deer have tremendous potential for effecting long-distance seed dispersal via ingestion and defecation. We conclude that white-tailed deer represent a significant and previously unappreciated vector of seed dispersal across the North American landscape, probably contributing an important long-distance component to the seed shadows of hundreds of plant species, and providing a mechanism to help explain rapid rates of plant migration.

show abstract

Life History Studies of Conopholis americana (Orobanchaceae)

Cited by 21 publications

References 5 publications

Use of stored carbon reserves in growth of temperate tree roots and leaf buds: analyses using radiocarbon measurements and modeling

Use of stored carbon reserves in growth of temperate tree roots and leaf buds: analyses using radiocarbon measurements and modeling

Structural attributes of the hypogeous holoparasite Hydnora triceps Drège & Meyer (Hydnoraceae)

Seed dispersal by white-tailed deer: implications for long-distance dispersal, invasion, and migration of plants in eastern North America

Contact Info

Product

Resources

About