EFFECTS OF TEMPERATURE ON PRIMARY GROWTH AND REGROWTHS OF ALFALFA

1972 ◽  
Vol 52 (6) ◽  
pp. 1017-1027 ◽  
Author(s):  
C. J. PEARSON ◽  
L. A. HUNT
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
Dry Weight ◽  
Growth Responses ◽  
Primary Growth ◽  
Whole Plant ◽  
Leaf Area Expansion ◽  
Medicago Sativa L ◽  
Effects Of Temperature ◽  
Area Expansion

The cumulative gain and distribution of dry matter are described for both primary growth and three subsequent regrowths of alfalfa (Medicago sativa L.) cults Vernal and Moapa at an irradiance (400–700 nm) of 25 nE cm−2 s−1 and day/night temperatures of 20/15 C and 30/25 C. Whole plant dry weight and leaf areas increased curvilinearly with time in primary growth and linearly in regrowth. Root plus stubble weight after cutting, increased from first to third regrowth. Rates of leaf area expansion increased with time in primary growth but were constant in regrowth; they were higher in regrowth than in primary growth, and higher at 20/15 C than at 30/25 C. Individual leaf area was greater at 20/15 C than at 30/25 C, whereas average specific leaf weight was less at 20/15 C than at 30/25 C. This latter finding probably reflected longer leaf life at 20/15 C. Number of days to 50% flowering was greater at 20/15 C than at 30/25 C. Growth responses to temperature were similar during primary growth and regrowths.

EFFECTS OF TEMPERATURE ON PRIMARY GROWTH OF ALFALFA

1972 ◽  
Vol 52 (6) ◽  
pp. 1007-1015 ◽  
Author(s):  
C. J. PEARSON ◽  
L. A. HUNT
Keyword(s):  
North America ◽  
Medicago Sativa ◽  
Low Temperatures ◽  
Dry Matter ◽  
Humid Zone ◽  
Flower Production ◽  
Primary Growth ◽  
Whole Plant ◽  
Medicago Sativa L ◽  
Effects Of Temperature

Effects of temperature on the cumulative gain and distribution of dry matter are described for the primary growth of alfalfa (Medicago sativa L.) cults Vernal and Moapa at an irradiance (400–700 nm) of 25 nE cm−2 s−1. Whole plant dry weights and leaf areas increased curvilinearly with time. Weight and area increments were faster, root-top weight increments were higher, and canopies were more erect, at 15/10 C and 20/15 C day/night temperatures than under warmer conditions. In contrast, rates of leaf, node, and flower production were slower at low temperatures. Differences between low and high temperatures were similar to those recorded in the field between first and third harvests in the cool humid zone of North America.

Is crop N demand more closely related to dry matter accumulation or leaf area expansion during vegetative growth?

2007 ◽  
Vol 100 (1) ◽  
pp. 91-106 ◽  
Author(s):  
Gilles Lemaire ◽  
Erik van Oosterom ◽  
John Sheehy ◽  
Marie Hélène Jeuffroy ◽  
Angelo Massignam ◽  
...  
Keyword(s):  
Leaf Area ◽  
Vegetative Growth ◽  
Dry Matter ◽  
Dry Matter Accumulation ◽  
Leaf Area Expansion ◽  
Area Expansion ◽  
N Demand

Interference and Temperature Effects on Growth of Cotton (Gossypium hirsutum), Spurred Anoda (Anoda cristata), and Velvetleaf (Abutilon theophrasti)

Weed Science ◽  
1983 ◽  
Vol 31 (6) ◽  
pp. 892-898 ◽  
Author(s):  
Elizabeth P. Flint ◽  
David T. Patterson ◽  
Jan L. Beyers
Keyword(s):  
Gossypium Hirsutum ◽  
Leaf Area ◽  
Dry Matter ◽  
Dry Weight ◽  
Abutilon Theophrasti ◽  
Dry Matter Production ◽  
Replacement Series ◽  
Matter Production ◽  
Effects Of Temperature ◽  
Anoda Cristata

Effects of temperature and interference were examined in a replacement series experiment with cotton (Gossypium hirsutumL. 'Stoneville 213′), spurred anodaAnoda cristata(L.) Schlecht. # ANVCR), and velvetleaf (Abutilon theophrastiMedic. # ABUTH). Plants were grown in controlled-environment greenhouses at day/night temperatures of 32/23 or 26/17 C, and harvested 14 or 39 days after planting. Height, dry weight, and leaf area at both harvests, and dry matter production and leaf area duration for the harvest interval were significantly greater in all species at 32/23 C than at 26/17 C. Interference reduced the dry weight per plant and leaf area at day 39, and dry matter production for the harvest interval. Cotton was somewhat superior to both weeds as a competitor at 32/23 C, while spurred anoda was somewhat superior to cotton and velvetleaf at 26/17 C.

scholarly journals EFFECT OF SODIUM CHLORIDE ON PHOTOSYNTHESIS AND WATER RELATIONS OF REDBUD

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1087d-1087
Author(s):  
Anthony S. Aiello ◽  
Robert J. Joly
Keyword(s):  
Sodium Chloride ◽  
Leaf Area ◽  
Cercis Canadensis ◽  
Whole Plant ◽  
Leaf Area Expansion ◽  
Hydroponically Grown ◽  
Area Expansion ◽  
High Treatment ◽  
Treatment Application ◽  
Hydroponic Growth

Redbud (Cercis canadensis) is known to be very susceptible to injury by road de-icing salts. The purpose of these experiments was to measure the effects of sodium chloride on net CO2 assimilation (A), conductance (g), transpiration (E), and leaf area expansion (LAE) of hydroponically grown redbud seedlings. Eight week-old seedlings were exposed to 0, 4500, and 9000ppm NaCl in the hydroponic growth solution. A, g, E, and LAE were measured for seven consecutive days during treatment application.A, g, E, an LAE all decreased with increased salt stress. By the seventh day, growth in NaCl at 4500 and 9000 ppm resulted in reductions in A from that that of the control by 34% and 63%, respectively. For the medium treatment, g and E had decreased by 70% over control rates, and by 85% over control for the high treatment. For the 0, 4500, and 9000ppm treatments, total leaf area increased by 68%, 46% and 28%, respectively, over the seven days of the experiment.Further experiments will examine the effect of treatments on whole plant transpiration, water potential and osmotic potential and will measure the ability of seedlings to recover from treatments of various duration.

scholarly journals EFFECT OF MINERAL DEFICIENCY ON MORPHOLOGICAL AND PHYSIOLOGICAL PARAMETERS AND ON SHOOT AND ROOT MINERAL PARTITIONING IN THREE SUNFLOWER VARIETIES / EFECTO DE LA FALTA DE ELEMENTOS MINERALAS SOBRE LOS PARAMENTROS MORFOLOGICOS Y FISIOLOGICOS Y REPARTICION DE ELEMENTOS MINERALES DE LA PARTE SOBRE EL SUELO Y DE LA RAIZ EN TRES VARIEDADES / INFLUENCE DE LA CARENCE D’ÉLÉMENTS MINÉRAUX SUR LES PARAMÈTRES MORPHOLOGIQUES ET PHYSIOLOGIQUES ET SUR LA DISTRIBUTION DES ÉLÉMENTS MINÉRAUX ENTRE LA PARTIE AÉRIENNE ET LA RACINE POUR TROIS SORTES DE TOURNESOL

Helia ◽  
2001 ◽  
Vol 24 (35) ◽  
pp. 135-148
Author(s):  
Mohammed El Midaoui ◽  
Ahmed Talouizte ◽  
Benbella Mohamed ◽  
Serieys Hervé ◽  
Ait Houssa Abdelhadi ◽  
...  
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
Growth Parameters ◽  
Dry Weight ◽  
Mineral Deficiency ◽  
P Deficiency ◽  
Plant Parts ◽  
Shoot Dry Weight ◽  
K Deficiency ◽  
Matter Effect

SUMMARYAn experiment has been carried out in order to study the behaviour under mineral deficiency of three sunflower genotypes, a population variety (Oro 9) and two hybrids (Mirasol and Albena). Sunflower seedlings were submitted to five treatments: N deficiency (N0), P deficiency (P0), K deficiency (K0), N and K deficiency (N0K0) and a control. Plants were harvested when they reached 3-4 true pairs of leaves. Growth parameters measured (height, total leaf area, root length, root and shoot dry mater) were all significantly reduced by mineral deficiency. Leaf area was most reduced by N0 (-61%) and P0 (-56%). Total dry matter was most affected by N0 (-63%) and by N0K0 (-66%). Genotype comparisons showed that Oro 9 had the highest shoot dry matter while Albena had the lowest root dry matter. Effect of mineral deficiency on content and partitioning of N, P, K, Ca and Na was significant and varied according to treatments and among plant parts. Shoot dry weight was significantly correlated with root N content (r2=0.81) and root K content (r2=-0.61) for N0 and K0.

scholarly journals Responses of Rice Growth to Day and Night Temperature and Relative Air Humidity—Leaf Elongation and Assimilation

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 134
Author(s):  
Sabine Stuerz ◽  
Folkard Asch
Keyword(s):  
Leaf Area ◽  
Leaf Growth ◽  
Crop Growth ◽  
Air Humidity ◽  
Leaf Elongation ◽  
Night Temperature ◽  
Relative Air Humidity ◽  
Leaf Area Expansion ◽  
Plant Level ◽  
Area Expansion

Predictions of future crop growth and yield under a changing climate require a precise knowledge of plant responses to their environment. Since leaf growth increases the photosynthesizing area of the plant, it occupies a central position during the vegetative phase. Rice is cultivated in diverse ecological zones largely differing in temperature and relative air humidity (RH). To investigate the effects of temperature and RH during day and night on leaf growth, one variety (IR64) was grown in a growth chamber using 9 day/night regimes around the same mean temperature and RH, which were combinations of 3 temperature treatments (30/20 °C, 25/25 °C, 20/30 °C day/night temperature) and 3 RH treatments (40/90%, 65/65%, 90/40% day/night RH). Day/night leaf elongation rates (LER) were measured and compared to leaf gas exchange measurements and leaf area expansion on the plant level. While daytime LER was mainly temperature-dependent, nighttime LER was equally affected by temperature and RH and closely correlated with leaf area expansion at the plant level. We hypothesize that the same parameters increasing LER during the night also enhance leaf area expansion via shifts in partitioning to larger and thinner leaves. Further, base temperatures estimated from LERs varied with RH, emphasizing the need to take RH into consideration when modeling crop growth in response to temperature.

EFFECTS OF TEMPERATURE ON RATE AND DURATION OF KERNEL DRY MATTER ACCUMULATION OF MAIZE

1988 ◽  
Vol 68 (4) ◽  
pp. 935-940 ◽  
Author(s):  
M. TOLLENAAR ◽  
T. W. BRUULSEMA
Keyword(s):  
Growth Rate ◽  
Zea Mays ◽  
Dry Matter ◽  
Zea Mays L ◽  
Dry Weight ◽  
Controlled Environment ◽  
Dry Matter Accumulation ◽  
Linear Kernel ◽  
Effects Of Temperature ◽  
Kernel Growth

The response of rate and duration of kernel dry matter accumulation to temperatures in the range 10–25 °C was studied for two maize (Zea mays L.) hybrids grown under controlled-environment conditions. Kernel growth rates during the period of linear kernel growth increased linearly with temperature (b = 0.3 mg kernel−1 d−1 °C−1). Kernel dry weight at physiological maturity varied little among temperature treatments because the increase in kernel growth rate with increase in temperature was associated with a decline in the duration of kernel growth proportional to the increase in kernel growth rate.Key words: Zea mays L, period of linear kernel dry matter accumulation, controlled-environment conditions, kernel growth rate

Sign in / Sign up

Export Citation Format

Share Document