Emergent properties of plants competing in silico for space and light: Seeing the tree from the forest.

abstract：PREMISE OF THE STUDY:It has been hypothesized that two flower types permit flexible allocation of resources to female and male functions, yet empirical evidence for the sex-allocation hypothesis remains scarce in gynomonoecious species. To characterize resource allocation to pistillate and perfect flowers and allocatio...

journal_title：American journal of botany

authors： Mamut J,Xiong YZ,Tan DY,Huang SQ

更新日期：2017-03-01 00:00:00

abstract：:Yucca glauca is a C(3) evergreen rosette species locally common in the C(4)-dominated grasslands of the central Great Plains. Most congeners of Y. glauca are found in deserts, and Y. glauca's morphological similarities to desert species (steeply angled leaves, evergreen habit) may be critical to its success in grassla...

journal_title：American journal of botany

authors： Maragni LA,Knapp AK,McAllister CA

更新日期：2000-02-01 00:00:00

abstract：:In volume 97(2) of the American Journal of Botany (pp. 268-275), we published an article entitled "Structural, physiological, and stable carbon isotopic evidence that the enigmatic Paleozoic fossil Prototaxites formed from rolled liverwort mats". Here, we respond to a letter and a commentary on our article in the pres...

journal_title：American journal of botany

authors： Graham LE,Cook ME,Hanson DT,Pigg KB,Graham JM

更新日期：2010-07-01 00:00:00

abstract：PREMISE OF THE STUDY:The apical meristem generates indeterminate apical growth of the stem and root of vascular plants. Our previous examination showed that shoot apical meristems (SAMs) can be classified into two types based on plasmodesmatal networks (PNs), which are important elements in symplasmic signaling pathway...

journal_title：American journal of botany

authors： Imaichi R,Moritoki N,Solvang HK

更新日期：2018-09-01 00:00:00

abstract：PREMISE:Woody plants with photosynthetic stems are common in the drylands of the world; however, we know little about the origin(s) and geographical distribution of photosynthetic stems. Therefore, we set to answer the following questions: (1) Is stem photosynthesis phylogenetically conserved? (2) Do green-stemmed and ...

journal_title：American journal of botany

authors： Ávila-Lovera E,Garcillán PP

更新日期：2020-12-06 00:00:00

abstract：:A long-term survey (1990-2000) of pollination modes of 86 tree species was carried out at Kakachi, a mid-elevation wet forest site in southern Western Ghats, India. Observations were made on 86 tree species. This comprises 80% of the total arborescent species present in the site. Approximately 75% of these species wer...

journal_title：American journal of botany

authors： Devy MS,Davidar P

更新日期：2003-04-01 00:00:00

abstract：PREMISE OF THE STUDY:A total of 38 polymorphic microsatellite loci of the Indian jujube (Ziziphus mauritiana), an economically important fruit tree, were developed to evaluate genetic diversity and aid in the identification of cultivars. METHODS AND RESULTS:The 38 microsatellite markers were isolated from the Indian j...

journal_title：American journal of botany

authors： Chiou CY,Chiang YC,Chen CH,Yen CR,Lee SR,Lin YS,Tsai CC

更新日期：2012-05-01 00:00:00

abstract：:Breadfruit (Artocarpus altilis, Moraceae), a traditional starch crop in Oceania, has enjoyed legendary status ever since its role in the infamous mutiny aboard the H.M.S. Bounty in 1789, yet its origins remain unclear. Breadfruit's closest relatives are A. camansi and A. mariannensis. DNA fingerprinting data (AFLP, am...

journal_title：American journal of botany

authors： Zerega NJ,Ragone D,Motley TJ

更新日期：2004-05-01 00:00:00

abstract：:Sex allocation models predict that cosexuality is stabilized by high allocation to attractive structures in pollen-limited species or by high allocation to shared structures that contribute to both genders. High investment in unilateral fixed costs favor the evolution of dioecy or gender change. With these predictions...

journal_title：American journal of botany

authors： Méndez M

更新日期：2001-10-01 00:00:00

abstract：:Koch et al. (Nature 428: 851-854) measured various parameters that were thought to limit the height of Sequoia sempervirens from northern California and concluded that the maximum height for this species is 122-130 m because within this range: (1) Irreversible embolism formation was proposed to occur when the xylem pr...

journal_title：American journal of botany

authors： Netting AG

更新日期：2009-02-01 00:00:00

abstract：:Multiply sired fruits provide unambiguous evidence that pollen from two or more donors was deposited on a stigma and successfully fertilized ovules. Such multiple paternity within fruits can have important consequences for both parental and offspring fitness, but little is known about the frequency of multiple paterni...

journal_title：American journal of botany

authors： Mitchell RJ,Karron JD,Holmquist KG,Bell JM

更新日期：2005-05-01 00:00:00

abstract：PREMISE OF THE STUDY:Mixotrophy is a strategy whereby plants acquire carbon both through photosynthesis and heterotrophic exploitation of mycorrhizal fungi. In Euro-American Pyroleae species studied hitherto, heterotrophy levels vary according to species, sites of study, and possibly light conditions. We investigated m...

journal_title：American journal of botany

authors： Matsuda Y,Shimizu S,Mori M,Ito S,Selosse MA

更新日期：2012-07-01 00:00:00

abstract：PREMISE OF THE STUDY:Microsatellite primers were developed in the native legume tree Anadenanthera colubrina var. cebil to study the genetic diversity and genetic structure in natural populations in Argentina. METHODS AND RESULTS:Nine microsatellite markers were identified using a genomic library enriched for tandemly...

journal_title：American journal of botany

authors： Barrandeguy ME,Prinz K,García MV,Finkeldey R

更新日期：2012-09-01 00:00:00

abstract：PREMISE OF THE STUDY:Pollen dispersal is a key process that influences ecological and evolutionary dynamics of plant populations by facilitating sexual reproduction and gene flow. Habitat loss and fragmentation have the potential to reduce pollen dispersal within and among habitat patches. We assessed aquatic pollen di...

journal_title：American journal of botany

authors： Lloyd MW,Tumas HR,Neel MC

更新日期：2018-02-01 00:00:00

abstract：:Polyploids have significantly influenced angiosperm evolution. Understanding the genetic consequences of polyploidy is advanced by studies on synthetic allopolyploids that mimic natural species. In Nicotiana, Burk (1973) and Kostoff (1938) generated synthetic tobacco (N. tabacum) using the parents ♀N. sylvestris × ♂N....

journal_title：American journal of botany

authors： Lim KY,Souckova-Skalicka K,Sarasan V,Clarkson JJ,Chase MW,Kovarik A,Leitch AR

更新日期：2006-06-01 00:00:00

abstract：:Ontogenetic changes in architecture, carbohydrate reserves, and resource allocation can constrain the ability of plants to compensate for herbivore damage. To evaluate ontogenetic changes in compensation, saplings and reproductive individuals of the tropical tree Casearia nitida were subjected to three levels of defol...

journal_title：American journal of botany

authors： Boege K

更新日期：2005-10-01 00:00:00

abstract：UNLABELLED:• PREMISE OF THE STUDY:Two ovulate conifer cones, one of which is attached terminally to a short leafy shoot, reveal the presence of a new species of Hughmillerites in the Early Cretaceous Apple Bay flora of Vancouver Island, British Columbia, Canada. This ancient conifer expands the diversity of Cupressace...

journal_title：American journal of botany

authors： Atkinson BA,Rothwell GW,Stockey RA

更新日期：2014-12-01 00:00:00

abstract：:Soybean partial-female-sterile mutant 1 (PS-1) was recovered from a gene-tagging study. The objectives were to study the inheritance, linkage, allelism, and certain aspects of the reproductive biology of the PS-1 mutant. For inheritance and linkage tests, PS-1 was crossed to flower color mutant Harosoy-w4 and to chlor...

journal_title：American journal of botany

authors： Pereira T,Lersten N,Palmer R

更新日期：1997-06-01 00:00:00

abstract：UNLABELLED:• PREMISE OF THE STUDY:Flower color is one of the best-studied floral traits in terms of its genetic basis and ecological significance, yet few studies have examined the processes that shape its evolution across deep timescales. Advances in comparative methods along with larger phylogenies for floral radiat...

journal_title：American journal of botany

authors： Smith SD,Goldberg EE

更新日期：2015-07-01 00:00:00

abstract：:During the crown-building phase, the mechanical architecture of the trunk of Aralia spinosa exhibits considerable ontogenetic variation. All trunks were tapered along their length, and taper was dependent on both ramet size and age; older, larger trunks were more tapered than younger, smaller trunks. Trunk specific gr...

journal_title：American journal of botany

authors： Briand CH,Campion SM,Dzambo DA,Wilson KA

更新日期：1999-12-01 00:00:00

abstract：:Pinus rzedowskii is an endangered pine species from Michoacán (central México), which has been previously reported from only three localities. Classified within the subgenus Strobus, it exhibits intermediate morphological characters between subgenera Strobus and Pinus. We analyzed genetic aspects that could shed light...

journal_title：American journal of botany

authors： Delgado P,Piñero D,Chaos A,Pérez-Nasser N,Alvarez-Buylla ER

更新日期：1999-05-01 00:00:00

abstract：PREMISE:Gynomonoecy is an infrequent sexual system in angiosperms, although widely represented within the Asteraceae family. Currently, the hypothesis of two nuclear loci controling gynomonoecy is the most accepted. However, the genic interactions are still uncertain. Anacyclus clavatus, A. homogamos, and A. valentinus...

journal_title：American journal of botany

authors： Álvarez I,Agudo AB,Herrero A,Torices R

更新日期：2020-01-01 00:00:00

abstract：:Clarkia (Onagraceae) is a genus of 42 annual species, mostly native to California, that has served as a model for many studies of plant evolutionary biology, particularly morphological, cytological, and genetic divergence; reproductive isolation; and speciation. Section Sympherica is the largest section with eight dip...

journal_title：American journal of botany

authors： Ford VS,Gottlieb LD

更新日期：2003-02-01 00:00:00

abstract：:Up to 22% of plant species are the result of breeding among species-hybridization-directly conflicting with the prediction that hybrids, compared to parental species, are intermediate in character and of low fitness and little consequence. Few studies, however, have compared the fitness of hybrids and parental species...

journal_title：American journal of botany

authors： Tierney DA,Wardle GM

更新日期：2008-02-01 00:00:00

abstract：PREMISE OF THE STUDY:Reintroductions may be essential to prevent extinction of many critically endangered species. Ideally, reintroduction efforts rely on adjacent source populations, but limited source material may necessitate crossing individuals from different and possibly distant populations. To determine the conse...

journal_title：American journal of botany

authors： Weisenberger LA,Weller SG,Sakai AK

更新日期：2014-11-01 00:00:00

abstract：:Nuclear and chloroplast DNA variation was assayed for two populations of Louisiana irises (Bayou Teche and Young's Coulee) that demonstrated extreme morphological variation and for a sample of the putative hybrid species, Iris nelsonii. The genetic markers examined in this analysis were diagnostic for either Iris fulv...

journal_title：American journal of botany

authors： Arnold ML

更新日期：1993-05-01 00:00:00

abstract：:Six of 14 species of Triteleia were studied. All possess septal nectaries, raphides in the ovary wall, an anatropous and crassinucellate ovule with a micropyle formed by the inner integument only, and parietal cells. A short and thick nucellus, which is not penetrated by the embryo sac, has a one-layered apical epider...

journal_title：American journal of botany

authors： Berg RY

更新日期：2003-06-01 00:00:00

abstract：:Microelectrodes were used to study the oxygen concentration within Myrica gale L. nodules. Low oxygen concentrations were found only in the region of the mature, nitrogen-fixing endophyte, and appeared to correspond to clusters of infected host cells. The oxygen concentration in the remainder of the nodule was much hi...

journal_title：American journal of botany

authors： Tjepkema JD

更新日期：1983-01-01 00:00:00

abstract：:• Premise of the study: Carpel closure is commonly considered as a key innovation in angiosperms; however, some families continue to exhibit a variety of forms of incomplete carpel closure. The carpel of Sagittaria species contains an unusual structure. In this study, we confirm the closure type of the carpel of Sagit...

journal_title：American journal of botany

authors： Huang LJ,Wang XW,Wang XF

更新日期：2014-07-01 00:00:00

abstract：PREMISE OF THE STUDY:Microsatellite markers were developed for Petunia integrifolia subsp. depauperata with an intent to clarify taxonomic questions on the P. integrifolia complex, and to identify a purple-flowered parent of P. hybrida. METHODS AND RESULTS:We characterized 11 microsatellite loci by screening primers d...

journal_title：American journal of botany

authors： Kriedt RA,Ramos-Fregonezi AM,Beheregaray LB,Bonatto SL,Freitas LB

更新日期：2011-10-01 00:00:00