Leaf Initiation Rates and Volume Growth Rates in the Shoot Apex of Chrysanthemum

Berg, Arthur R.; Cutter, Elizabeth G.

doi:10.1002/j.1537-2197.1969.tb07518.x

Cited by 19 publications

(15 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, during the early and late phases ofdevelopment, leaf-divergence angles may change significantly. Rates ofleaf initiation remain constant, despite wide variation in environmental factors, and require significant experimental manipulation to change (Berg and Cutter, 1969;Romberger and Gregory, 1977;Green, 1985Green, , 1986; see Hardwick, 1986). Consequently, phyllotactic pattern is frequently a good taxonomic character (Schiiepp, 1959;Rutishauser, 1981Rutishauser, , 1982Rutishauser and Sattler, 1985).…”

Section: Discussionmentioning

confidence: 99%

The Role of Phyllotactic Pattern as a “Developmental Constraint” on the Interception of Light by Leaf Surfaces

Niklas

1988

Evolution

108

View full text Add to dashboard Cite

Computer simulations of model plants are used to assess the influence of leaf shape, size, and pattern of arrangement (= phyllotaxy) on the direct solar radiation intercepted by leaf surfaces. Changes in phyllotaxy significantly influence light interception (and, by inference, net assimilation rate) for rosette growth habits. However, changes in leaf shape and orientation and in stem length can compensate for the negative effects of leaf overlap produced by phyllotactic patterns. Phyllotaxy is viewed as a developmental limiting factor in photobiology that may necessitate compensatory changes in other morphological features not directly controlled by patterns of leaf initiation. This distinguishes it from functioning as a "developmental constraint" sensu stricto and may provide a paradigm for other features in plant evolution.

show abstract

Section: Discussionmentioning

confidence: 99%

The Role of Phyllotactic Pattern as a “Developmental Constraint” on the Interception of Light by Leaf Surfaces

Niklas

1988

Evolution

108

View full text Add to dashboard Cite

show abstract

“…Van Iterson (1907) discussed briefly the possibility of constructing contiguous ellipses on various surfaces models but left this project for future investigators. In light of the differences in relative radial and vertical rates of growth observed for Epilobium and other species (Meicenheimer, 1979;Berg and Cutter, 1969) such modeling appears worthwhile. It can be argued that the existing models of phyl-lotaxy which utilize regular lattice cylindrical constructions are transformable into exponentially growing systems, but this transformation combines both radial and vertical growth rates into a single parameter, whereas, in shoot systems that have actually been investigated these rates are different.…”

mentioning

confidence: 99%

CHANGES IN EPILOBIUM PHYLLOTAXY INDUCED BY N‐1‐NAPHTHYLPHTHALAMIC ACID AND α‐4‐CHLOROPHENOXYISOBUTYRIC ACID

Meicenheimer

1981

American J of Botany

View full text Add to dashboard Cite

Preliminary studies establishing relationships between leaf plastochron index and Epilobium hirsutum L. shoot growth provide a method for rigorous selection of plants utilized in experiments designed to test the working hypothesis that endogenous auxin gradient interactions are factors of phyllotactic control in this species. Application of Nsl-naphthylphthalamic acid (NPA), an auxin transport inhibitor, to one of the youngest bijugate primordia on the shoot meristem results in increased growth of the treated primordium. Fasciation between the treated primordium and one of the next primordia to be initiated alters relative vertical spacing of primordia. Angular shifts between subsequent primordia result in spiral transformation of Epilabium bijugate phyllotaxy. Application of a-4-chlorophenoxyisobutyric acid (CPIB), an auxin antagonist, to one of the youngest bijugate primordia on the shoot meristem results in decreased growth of the treated primordium that alters both radial and vertical spacing of primordia. This is followed by angular shifts between subsequent primordia resulting in spiral transformation of the bijugate phyllotaxy. Changes in the growth parameters of NPA-and CPIB-treated shoots are similar. Relative plastochron rates of radial and vertical shoot growth of induced spiral shoots are about half those of lanolin paste control shoots, as are the plastochrons and relative plastochron rates of leaf elongation. Treated shoot meristems have eccentricities of 0.5 as compared to bijugate control meristem eccentricities of 0.7. No significant difference is apparent between basal transverse areas of treated and control shoot meristems. The relative chronological rates of growth of treated shoots are not significantly different from those rates of control shoots. Spiral transformation results from changes in relative positions ofleafprimordia insertion on the shoot meristem, not from changes in growth of treated shoots. These changes are accompanied by an increased rate of leaf initiation on a more circular shoot meristem. Existing theoretical models of phyllotaxy are discussed in relation to these chemically induced changes of Epilobium leaf arrangement.

show abstract

“…The shoot apex of maize increases linearly in all of its dimensions, length, width, and thickness, with plastochron stage (Abbe and Phinney, 1951). Berg and Cutter (1969) found that the Chrysanthemum shoot apex increases in size at a constant rate over the nine successive plastochron stages examined.…”

Section: Discussion-mentioning

confidence: 89%

Apical Size in the Determination of Corolla Lobe Number in Linanthus androsaecus ssp. Androsaecus

Stevens

Huether

Wilson

1972

American Journal of Botany

View full text Add to dashboard Cite

A hypothesis in the literature suggests that apical size is one of the critical determinants of the number of organs a flower will form. Genetically selected and control lines of Linanthus androsaecus ssp. androsaecus (Polemoniaceae) were used to test this hypothesis. Plants in the selection up (SU) line of this species produce flowers with greater than the normal number of corolla lobes, and plants in the selection down (SD) line produce less than the normal number of corolla lobes. Apices from lateral branches collected from plants just prior to flowering differed in size among these two lines and controls. Plants in the SU line showed an increase in apical diameter in median section while plants in the SD line showed a decrease in apical diameter in comparison to controls. SU plants may be flowering later, and SD plants earlier, than controls. SU and control apices from the main stem, collected from plants in a late stage of vegetative growth, also differed in apical diameter. Increase in the number of apical cells is associated with increased size in SU apices in comparison to controls. Apical size differences associated with petal number appear to become established during vegetative growth by the time the first two pairs of foliage leaves are formed. The selected and control lines of L. androsaecus offer support for the hypothesis that apical size is an important factor in the determination of petal number.

show abstract

Leaf Initiation Rates and Volume Growth Rates in the Shoot Apex of Chrysanthemum

Cited by 19 publications

References 21 publications

The Role of Phyllotactic Pattern as a “Developmental Constraint” on the Interception of Light by Leaf Surfaces

The Role of Phyllotactic Pattern as a “Developmental Constraint” on the Interception of Light by Leaf Surfaces

CHANGES IN EPILOBIUM PHYLLOTAXY INDUCED BY N‐1‐NAPHTHYLPHTHALAMIC ACID AND α‐4‐CHLOROPHENOXYISOBUTYRIC ACID

Apical Size in the Determination of Corolla Lobe Number in Linanthus androsaecus ssp. Androsaecus

Contact Info

Product

Resources

About