Assessing potential invasiveness of woody horticultural plant species using seedling growth rate traits

Methyl jasmonate (MeJA) can induce defence responses in plants to pathogen attack, but it can also have consequences for plant growth. The transient effects of exogenous MeJA treatment on the resistance of Monterey pine ( Pinus radiata D. Don) seedlings to Diplodia pinea (Desm.) Kickx. and some physiological parameters affecting the impact of treatment on seedling growth were investigated. Following foliar application of 4.5 mmol·L–1 MeJA, disease resistance was greatest 1–2 weeks after treatment and declined with time thereafter. Elevated disease resistance was accompanied by a reduction in seedling growth rate the second week following MeJA treatment. Thereafter, seedling growth rate recovered and exceeded that of the control seedlings 4–5 weeks after MeJA treatment. Within hours of MeJA treatment, reductions in both the capacity of photosystem II and transpiration rate were observed, resulting in a concomitant reduction in net CO2 uptake rate. The slight reduction in transpiration rate was also associated with an increase in needle water potential. Longer term measurements showed no effect of MeJA on photosynthetic rate, transpiration rate, chlorophyll content, or shoot water potential and thus could not account for the elevated growth rate observed 4–5 weeks after treatment.

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Measurement of seedling growth rate by machine vision

10.1117/12.144027 ◽

1993 ◽

Cited By ~ 1

Author(s):

M. Scott Howarth ◽

Phillip C. Stanwood

Keyword(s):

Growth Rate ◽

Machine Vision ◽

Seedling Growth ◽

Seedling Growth Rate

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The inheritance of seedling growth rate in grain sorghum

South African Journal of Plant and Soil ◽

10.1080/02571862.1994.10634283 ◽

1994 ◽

Vol 11 (1) ◽

pp. 1-4 ◽

Cited By ~ 1

Author(s):

W. G. Wenzel

Keyword(s):

Growth Rate ◽

Seedling Growth ◽

Grain Sorghum ◽

Seedling Growth Rate

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Evaluation of seedling growth rate using image processing

2013 IEEE International Conference on Computational Intelligence and Computing Research ◽

10.1109/iccic.2013.6724248 ◽

2013 ◽

Cited By ~ 1

Author(s):

P. P. Belsare ◽

S. K. Shah

Keyword(s):

Image Processing ◽

Growth Rate ◽

Seedling Growth ◽

Seedling Growth Rate

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Vigour evaluation of cocksfoot (Dactylis glomerata) seeds of different age

Acta Agrobotanica ◽

10.5586/aa.1989.002 ◽

2013 ◽

Vol 42 (1-2) ◽

pp. 23-33

Author(s):

Ryszard J. Górecki ◽

Dorota Mierzejewska ◽

Jan Kaszuba ◽

Stanisław Grzesiuk ◽

Andrzej Rejowski

Keyword(s):

Growth Rate ◽

Osmotic Stress ◽

Seedling Growth ◽

Dactylis Glomerata ◽

Natural Ageing ◽

Stress Tests ◽

Seed Vigour ◽

Seedling Growth Rate ◽

Field Emergence

Cocksfoot seeds cv. Baza and Bepro, harvested in 1986, 1985, 1984, and 1983 and stored in a store-house were studied. Seed lots did not differ greatly in their viability. However, significant reduction in seed vigour due to natural ageing as measured by soil emergence, seedling growth rate, and ethanol and osmotic stress tests was noted. A conductivity test did not indicate vigour changes of ageing seeds, and its correlation with field emergence was poor. The methodical aspects of vigour evaluation of cocksfoot seeds are discussed.

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The vigour of timothy (Phleum pratense L.) seeds stored up to 5 years

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.1989.022 ◽

2014 ◽

Vol 58 (2) ◽

pp. 263-272 ◽

Cited By ~ 1

Author(s):

Ryszard J. Górecki ◽

Dorota Mierzejewska

Keyword(s):

Growth Rate ◽

Osmotic Stress ◽

Seedling Growth ◽

Stress Test ◽

Seed Viability ◽

Phleum Pratense ◽

Accelerated Ageing ◽

Ambient Conditions ◽

Rate Analysis ◽

Seedling Growth Rate

The viability and vigour of timothy seeds from the 1982, 1983, 1984, 1985 and 1986 harvests, stored in a store-house under ambient conditions were studied. During five years of storage, seed viability dropped from 90-95% to below 15%. The greatest fall in viability occurred between the 4th and 5th year of storage. Seed viability loss was accompanied by rapid vigour degradation as indicated by soil emergence, seedling growth rate analysis, osmotic stress, ethanol, and accelerated ageing (AA-test) tests. The conductivity test was not useful in timothy vigour examination. The highest correlation coefficients between vigour tests and field emergence were obtained for the seedling growth rate analysis and osmotic stress test.

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