Hybrid vigour as indicated by early growth characteristics of Populus deltoides, P. nigra, and P. × euramericana

Cain, Nancy P.; Ormrod, D. P.

doi:10.1139/b84-001

Cited by 18 publications

(10 citation statements)

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“…The effect of treatments and clones on relative growth rate was evaluated with analysis of variance using natural log-transformed total dry weight as the dependent variable (Cain andOrmrod 1984, Poorter andLewis 1986). Due to loss of trees and the resulting design imbalance, clone 216 was not included in Experiment 1 for this analysis.…”

Section: Statisticsmentioning

confidence: 99%

“…The time by treatment effect was partitioned with orthogonal polynomials. A significant linear effect indicates constant relative growth rate during the experimental period while a significant higher order effect indicates variable relative growth rate (Cain andOrmrod 1984, Poorter andLewis 1986). Relative growth rate was calculated for each treatment by clone combination from the slope of log-transformed plant dry weight vs time using least-squares linear regression.…”

Section: Statisticsmentioning

confidence: 99%

“…During the experimental period, relative growth rate was constant for each relative addition rate and increased with increasing addition rate. Relative growth rate linearity and differences among treatments and clones were evaluated with analysis of variance on natural log-transformed dry weights collected during the experimental growth phase (Cain andOrmrod 1984, Poorter andLewis 1986). For the time main effect, more than 99% of the variation in log-transformed weight was explained by a linear response; therefore, relative growth rate was constant during the experimental period (Tab.…”

Section: Growth Responsementioning

confidence: 99%

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Growth and physiology of aspen supplied with different fertilizer addition rates

Coleman¹,

Dickson²,

Isebrands³

1998

Physiologia Plantarum

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Isebrands, J. G. 1998. Growth and physiology of aspen supplied with different fertilizer addition rates. -Physiol. Plant. 103: 513-526.Variable internal plant nutrient content may confound plant response to environmental stress. Plant nutrient content may be controlled with relative addition rate techniques in solution culture. However, because raising large numbers of plants in flowing solution culture is difficult. we investieated the feasibihtv of raisine slants in soil rnk using relative fertilizer additions. Asp& (Populus tremubides Michi.) clones (216, 259 and 271) planted in pots containing a peat, sand and vermiculite (2:1:1, v/v/v) soil mix were grown with exponentially increasing fertilizer concentrations and harvested periodically to assess growth. Addition rate treatments ranged from 0.01 to 0.05 day-'. The lag phase of growth, in which plants adjusted to the fertilizer regime, lasted 40 days after-which piants entered the-experimental period characterized by constant relative growth rates equivalent to applied fertilizer addition rates. Total plant nutrient concentration was (1) unique for each addition rate, (2) linearly related to addition rate and growth rate, and (3) tended to increase at the highest, and decrease at the lowest addition rates. Regardless, the plants appeared to have attained steady-state conditions. Allocation of carbon to roots increased with lower addition rate treatments and was not denendent unon ontoeenv. There were no treatment differences in growth response among aspen clones. Yet there were treatment differences in leaf chlorophyll and photosynthesis within the clones. For the 0.05 dav-' addition rate treatment. chloronhvll. leaf N concentration and photosynthefic rate were strongly correlated with ohe'another, were at a maximum in recently mature leaves, and rapidly declined with leaf age. The rate of decline in these leaf characteristics was slowest in clone 271, consistent with the leaf longevity stress response reported elsewhere. Plant responses from these relative fertilizer addition trials in soil mix agree closely with those run in hydroponics, indicating that steady-state nutrition can be achieved with a technically simple experimental assemblage.

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Section: Statisticsmentioning

confidence: 99%

Section: Statisticsmentioning

confidence: 99%

Section: Growth Responsementioning

confidence: 99%

See 1 more Smart Citation

Growth and physiology of aspen supplied with different fertilizer addition rates

Coleman¹,

Dickson²,

Isebrands³

1998

Physiologia Plantarum

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“…They suggested that leaves with high dry mass might have high photosynthetic accumulates that inhibit photosynthetic effi ciency. Cain and Ormrod (1984), studying two hybrids and two Populus clones, observed no signifi cant differences among clones in ratio of leaf mass to leaf area. In our study, there were no signifi cant differences among the clones for leaf area, leaf fresh or leaf dry mass.…”

Section: Discussionmentioning

confidence: 94%

Can physiological and anatomical characters be used for selecting high yielding hybrid aspen clones?

Yu¹

2001

Silva Fenn.

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Stomatal, CO 2 exchange parameters and several leaf and growth traits were recorded in a fi ve-year-old hybrid aspen clone trial. The fi eld trial consisted of four aspen hybrid clones (Populus tremula L. × P. tremuloides Michx.) and one local Populus tremula seedling source. The mean estimated height of hybrid aspen clones was 1.6 times higher than for P. tremula. Similarly, basal diameter was 1.5 times and breast diameter 1.8 times higher in the hybrids. Differences were observed for physiological and growth traits among hybrid clones and P. tremula, but, only stomatal characters of hybrid clones differed signifi cantly from those in P. tremula. Hybrid clones had larger guard cells (22.9 µm) than P. tremula (19.2 µm), whereas P. tremula had a higher stomatal density (211.3/mm 2 ) than the hybrid clones (164.4/mm 2 ). Among four hybrid clones, net photosynthesis was strongly correlated with foliar nitrogen. Height correlated signifi cantly with foliar nitrogen, but negatively with leaf fresh weight, leaf dry weight and stomatal density. The results suggested that yield components could be controlled by many genes, specifi c to each clone. No single gas exchange or morphological variable can provide a reliable indicator of yield potential.

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“…A third method has been used -without further elaboration -by Cain and Ormrod (1984). In the present paper we describe this method in more detail and show that it incorporates the computational advantages of both the classical and the functional approach.…”

Section: Introductionmentioning

confidence: 99%

Testing differences in relative growth rate: A method avoiding curve fitting and pairing

Poorter

Lewis

1986

Physiologia Plantarum

129

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. 1986. Testing differences in relative growth rate: A method avoiding curve fitting and pairing. -Physiol. Plant. 67: 223-226.A method is discussed to test differences in relative growth rates. This method is based on an analysis of variance, with ln-transformed plant weight as dependent variable. A significant Group × Time interaction indicates differences in relative growth rates between groups. The advantages over the "classical" and "functional" growth analyses are: (1) No pairing procedure is required. (2) More than two groups may be evaluated in one analysis. (3) No decision is required about the polynomial used to fit the data. (4) By partitioning the interaction effect using orthogonal polynomials insight is gained into the nature of differences in relative growth rate. (5) By concentrating attention on the lower order terms of the polynomials, the influence of extraneous variation on conclusions may be minimized. Additional key word -Growth analysis.

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Hybrid vigour as indicated by early growth characteristics of Populus deltoides, P. nigra, and P. × euramericana

Cited by 18 publications

References 0 publications

Growth and physiology of aspen supplied with different fertilizer addition rates

Growth and physiology of aspen supplied with different fertilizer addition rates

Can physiological and anatomical characters be used for selecting high yielding hybrid aspen clones?

Testing differences in relative growth rate: A method avoiding curve fitting and pairing

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