Abstract
The rate coefficients of the exponential period of growth of the vegetative organs of Marquis wheat were changed and made biphasic by the morphogenesis of the stem apex from the vegetative to the flowering state. The rate coefficient of stem elongation was lower in the initial or vegetative phase than later, and it was initially insensitive to temperature up to 20 °C but temperature sensitive in the final or flowering phase from 10 °C to 30 °C. In contrast the growth coefficients of plant, shoots, and roots computed from measurements of dry weight were higher in the first phase than in the second phase and increased with temperature to a maximum at 20 °C in both phases. The differences were attributed to the less autotrophic nature and initially more limited growth of the stem. The raised stem-growth coefficient in the flowering phase was compensated by slowed growth of its shoot. Tillers grew most rapidly, successive tillers more so, and accounted for the previously observed dominant growth of "stems" as stems plus leaf sheaths. The change of slope within the exponential plots was not noticed in previous work at 25 °C and it portends higher maximal coefficients for vegetative (initial phase) plant growth than those previously estimated from the entire exponential period. However, under optimal conditions the growth coefficient of the whole plant seems to be internally limited to about half that of one or another organ.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Apex transition to flowering made vegetative organ growth rate coefficients biphasic.
Verbatim
e0“The rate coefficients of the exponential period of growth of the vegetative organs of Marquis wheat were changed and made biphasic by the morphogenesis of the stem apex from the vegetative to the flowering state”
Claim · model-written summary
Stem elongation coefficient was lower in the vegetative phase than flowering phase.
Verbatim
e0“The rate coefficient of stem elongation was lower in the initial or vegetative phase than later”
t0“Marquis wheat”
Claim · model-written summary
Stem elongation was temperature insensitive up to 20 °C in the vegetative phase.
Verbatim
e0“it was initially insensitive to temperature up to 20 °C”
t0“Marquis wheat”
Claim · model-written summary
Stem elongation was temperature sensitive from 10 °C to 30 °C in flowering phase.
Verbatim
e0“temperature sensitive in the final or flowering phase from 10 °C to 30 °C”
t0“Marquis wheat”
Claim · model-written summary
Plant, shoot and root dry weight growth coefficients were higher in the first phase.
Verbatim
e0“growth coefficients of plant, shoots, and roots computed from measurements of dry weight were higher in the first phase than in the second phase”
t0“Marquis wheat”
Claim · model-written summary
Plant, shoot and root growth coefficients increased with temperature to a maximum at 20 °C.
Verbatim
e0“increased with temperature to a maximum at 20 °C in both phases”
e1“growth coefficients of plant, shoots, and roots”
t0“Marquis wheat”
Claim · model-written summary
The authors attributed phase differences to lower stem autotrophy and initially limited stem growth.
Verbatim
e0“The differences were attributed to the less autotrophic nature and initially more limited growth of the stem”
t0“Marquis wheat”
Claim · model-written summary
Greater stem growth during flowering was compensated by slower shoot growth.
Verbatim
e0“The raised stem-growth coefficient in the flowering phase was compensated by slowed growth of its shoot”
t0“Marquis wheat”
Claim · model-written summary
Tillers grew most rapidly, with successive tillers growing more rapidly.
Verbatim
e0“Tillers grew most rapidly, successive tillers more so”
t0“Marquis wheat”
Claim · model-written summary
Tiller growth accounted for the previously observed dominant growth of stems plus sheaths.
Verbatim
e0“accounted for the previously observed dominant growth of "stems" as stems plus leaf sheaths”
t0“Marquis wheat”
Claim · model-written summary
The slope change implies higher maximal vegetative plant growth coefficients than earlier estimates.
Verbatim
e0“it portends higher maximal coefficients for vegetative (initial phase) plant growth than those previously estimated from the entire exponential period”
t0“Marquis wheat”
Claim · model-written summary
Under optimal conditions whole-plant growth coefficient appears limited to about half an organ coefficient.
Verbatim
e0“under optimal conditions the growth coefficient of the whole plant seems to be internally limited to about half that of one or another organ”
t0“Marquis wheat”