Effects of night temperature on the growth of Nicotiana tabacum

1967 ◽  
Vol 7 (24) ◽  
pp. 78 ◽  
Author(s):  
JM Hipkinson
Keyword(s):  
Nicotiana Tabacum ◽  
Leaf Growth ◽  
Dry Weight ◽  
Physiological Adaptation ◽  
Flower Initiation ◽  
Night Temperature ◽  
Temperature Optimum ◽  
Leaf Production ◽  
Node Number ◽  
Nicotiana Tabacum L

Four varieties of flue-cured tobacco, Nicotiana tabacum L., showed similar responses to night temperatures of 10�, 16�, 22�, and 28�C, with a day temperature of 27�C. Leaf growth rates and leaf production rates were approximately the same at night temperatures of 28� and 22�C, and were successively lower at 16� and 10�C. Dry weight accumulation was greatest at 22�. The node number of flower initiation increased with increasing night temperature over the whole range. There was no evidence of either a shift in the night temperature optimum or a physiological adaptation to low temperature during development.

scholarly journals Leaf Growth and Development in the Young Tobacco Plant

1968 ◽  
Vol 21 (5) ◽  
pp. 855 ◽  
Author(s):  
Rae V Hannam
Keyword(s):  
Growth And Development ◽  
Tobacco Plant ◽  
Leaf Growth ◽  
Dry Weight ◽  
Leaf Primordia ◽  
Vegetative Shoot ◽  
Volume Changes ◽  
Whole Plant ◽  
Nicotiana Tabacum L ◽  
Weight Data

The growth of the vegetative shoot of tobacco, Nicotiana tabacum L., and the associated changes in dry weight of the whole plant and its major parts are described. By means of serial reconstruction, the volume changes of successive young leaf primordia are followed, and this information is integrated with the dry weight data for older leaves.

S-adenosine-L-homocysteine hydrolase from Nicotiana tabacum L.: Isolation and properties

1984 ◽  
Vol 49 (6) ◽  
pp. 1543-1551 ◽  
Author(s):  
Ladislava Šebestová ◽  
Ivan Votruba ◽  
Antonín Holý
Keyword(s):  
Molecular Weight ◽  
Nicotiana Tabacum ◽  
Isoelectric Focusing ◽  
Temperature Optimum ◽  
Ph Optimum ◽  
Equal Distribution ◽  
Nicotiana Tabacum L ◽  
Hydroxypropionic Acid

S-Adenosyl-L-homocysteine hydrolase (E.C. 3.3.1.1) (SAH hydrolase) from an explanate culture of Nicotiana tabacumL. was purified to homogeneity. The enzyme is composed of four subunits of molecular weight of 55 000. The native molecule of final molecular weight of 220 000 aggregates in solution to multimers of molecular weight of 440 000 and higher. When subjected to isoelectric focusing the enzyme yields two components of equal distribution and pI-values of 5.15 and 5.25. The enzyme is thermolabile and is readily inactivated at temperatures above 3 °C. The KM value for adenosine is 5.15 μmol l-1 and for S-adenosyl-L-homocysteine (SAH) 11 μmol l-1. The temperature optimum of both SAH synthesis and hydrolysis is 37 °C, the pH optimum of SAH hydrolysis is 8.0, of SAH synthesis 7.14. The enzyme is competitively inhibited by (S)-9-(2,3-dihydroxypropyl)adenine and inactivated by both enantiomers of eritadenine and 3-(adenin-9-yl)-2-hydroxypropionic acid.

scholarly journals Average Daily Temperature and Reversed Day/Night Temperature Regulate Vegetative and Reproductive Responses of a Doritis pulcherrima Lindley Hybrid

HortScience ◽  
2007 ◽  
Vol 42 (1) ◽  
pp. 68-70 ◽  
Author(s):  
Yin-Tung Wang
Keyword(s):  
Acid Metabolism ◽  
Leaf Growth ◽  
Daily Temperature ◽  
Width Ratio ◽  
Night Temperature ◽  
Leaf Production ◽  
Average Daily Temperature ◽  
Striking Effect ◽  
Oval Shape

It was unknown how prolonged periods of cool days and warm nights affect Phalaenopsis Blume hybrids, which perform crassulacean acid metabolism and absorb CO2 primarily at night. The ‘Lava Glow’ plants vegetatively propagated from a hybrid Doritaenopsis (Phalaenopsis Buddha's Treasure × Doritis pulcherrima Lindley*), 15 cm in leaf span, were grown at day/night (12 hours each daily) temperatures of 30/25, 25/30, 25/20, or 20/25 °C under 170 μmol·m−2·s−1 PPF. After 37 weeks, plants at the higher average daily temperature of 27.5 °C (ADT, 30/25 and 25/30 °C) produced more leaves than the lower 22.5 °C ADT. Those grown at 30/25 °C had the largest leaf span and combined length of the new leaves. Plants at 30/25, 25/30, 25/20, or 20/25 °C had 5.0, 4.7, 3.6, and 2.8 new leaves that were 72, 61, 44, and 29 cm in total length, respectively. Warmer nights than days resulted in a small leaf span, reduced leaf growth, and shorter leaves that were particularly noticeable at the 22.5 °C compared with 27.5 °C ADT. Leaves that emerged and grew at the lower ADT had a reduced length to width ratio and a more oval shape. The most striking effect of the 20/25 °C treatment was that 14 of 15 plants bloomed, whereas only five plants at 25/20 °C and none at 30/25 or 25/30 °C produced flowers. Similar results were obtained in a second experiment using 30/20, 20/30, 25/15, or 15/25 °C. After 29 weeks, all plants at 15/25 °C bloomed, whereas none in the other treatments had flowers. Long-term exposure to 15/25 °C resulted in slow leaf production and undesirable small leaves. These results suggest that day and night temperature may both affect growth and flowering of this orchid.

scholarly journals Transcriptome Profiling, Biochemical and Physiological Analyses Provide New Insights towards Drought Tolerance in Nicotiana tabacum L.

Genes ◽  
2019 ◽  
Vol 10 (12) ◽  
pp. 1041 ◽  
Author(s):  
Rayyan Khan ◽  
Peilu Zhou ◽  
Xinghua Ma ◽  
Lei Zhou ◽  
Yuanhua Wu ◽  
...  
Keyword(s):  
Drought Stress ◽  
Nicotiana Tabacum ◽  
Leaf Anatomy ◽  
Crop Production ◽  
Molecular Mechanisms ◽  
Molecular Level ◽  
Transcriptome Profiling ◽  
Dry Weight ◽  
Antioxidant Defense System ◽  
Nicotiana Tabacum L

Drought stress is one of the main factors limiting crop production, which provokes a number of changes in plants at physiological, anatomical, biochemical and molecular level. To unravel the various mechanisms underpinning tobacco (Nicotiana tabacum L.) drought stress tolerance, we conducted a comprehensive physiological, anatomical, biochemical and transcriptome analyses of three tobacco cultivars (i.e., HongHuaDaJinYuan (H), NC55 (N) and Yun Yan-100 (Y)) seedlings that had been exposed to drought stress. As a result, H maintained higher growth in term of less reduction in plant fresh weight, dry weight and chlorophyll content as compared with N and Y. Anatomical studies unveiled that drought stress had little effect on H by maintaining proper leaf anatomy while there were significant changes in the leaf anatomy of N and Y. Similarly, H among the three varieties was the least affected variety under drought stress, with more proline content accumulation and a powerful antioxidant defense system, which mitigates the negative impacts of reactive oxygen species. The transcriptomic analysis showed that the differential genes expression between HongHuaDaJinYuan, NC55 and Yun Yan-100 were enriched in the functions of plant hormone signal transduction, starch and sucrose metabolism, and arginine and proline metabolism. Compared to N and Y, the differentially expressed genes of H displayed enhanced expression in the corresponding pathways under drought stress. Together, our findings offer insights that H was more tolerant than the other two varieties, as evidenced at physiological, biochemical, anatomical and molecular level. These findings can help us to enhance our understanding of the molecular mechanisms through the networks of various metabolic pathways mediating drought stress adaptation in tobacco.

BILATERAL LEAF EXPANSION OF TOBACCO UNDER WATER STRESS

1988 ◽  
Vol 68 (3) ◽  
pp. 887-892 ◽  
Author(s):  
MARK J. KING
Keyword(s):  
Growth Rate ◽  
Water Stress ◽  
Nicotiana Tabacum ◽  
Dark Period ◽  
Leaf Growth ◽  
Video Camera ◽  
Light Period ◽  
Leaf Expansion ◽  
Nicotiana Tabacum L ◽  
Growth Distribution

Leaves of control and water-stressed tobacco plants (Nicotiana tabacum L.) were monitored nondestructively, and overall growth and growth distribution within the leaf were compared using a video camera interfaced to a computer. Leaf expansion of control leaves was linear with time. The expansion rate was highest during the dark period and the first 4 h of the light period. The growth rate declined as the light period progressed through 14 h. Leaf expansion of water-stressed plants began declining approximately 44 h after water was withheld. Growth rate during the subsequent dark period increased slightly. Growth resumed within 4–8 h after rewatering. Within 36 h after rewatering, the growth rate was again linear and comparable to controls. During the dark period, the growth distribution was more apical and less basal than during the light period. Lateral growth distribution within the leaf was not affected by developing water stress.Key words: Microcomputer, video camera, Nicotiana tabacum, leaf growth, water stress

A developmental gradient in the mechanism of K+ uptake during light-stimulated leaf growth in Nicotiana tabacum L.

Planta ◽  
2003 ◽  
Vol 217 (4) ◽  
pp. 587-596 ◽  
Author(s):  
Kari A. Stiles ◽  
Anna McClintick ◽  
Elizabeth Van Volkenburgh
Keyword(s):  
Nicotiana Tabacum ◽  
Leaf Growth ◽  
K Uptake ◽  
Nicotiana Tabacum L ◽  
Developmental Gradient

scholarly journals INFLUENCE OF GENOTYPE AND ENVIRONMENT ON YIELD COMPONENTS OF PRIMOCANE-FRUITING RED RASPBERRIES WITH EMPHASIS ON TEMPERATURE AND DAY LENGTH.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1118f-1118
Author(s):  
Jean-Pierre Privé ◽  
J.A. Sullivan ◽  
J.T.A. Proctor
Keyword(s):  
High Temperatures ◽  
Yield Components ◽  
Reproductive Potential ◽  
Dry Weight ◽  
Day Length ◽  
Controlled Environment ◽  
Night Temperature ◽  
Flower Number ◽  
Node Number ◽  
Temperature Regimes

`Autumn Bliss', `Heritage' and `Redwing' were grown in a controlled environment setting at three day/night temperature regimes (30/25, 25/20, 20/15C) at either 12 or 16 hour photo periods. Vegetative (height, diameter, node number, leaf area, leaf, cane and root dry weight) and reproductive (precocity, numbers of fruiting laterals, flower number and dry weight) parameters were analyzed. Optimum vegetative growth was obtained when plants were subjected to short photoperiods (12 hrs) and cool (20/15C) or moderate (25/20C) day/night temperatures. Reproductive characteristics were enhanced when grown under long photoperiods (16 hrs) and moderate temperatures. High temperatures (30/25) reduced cane height due to a decrease in internode length with the greatest reduction occurring under long photo periods. Precocity and flowering was enhanced by long photoperiods especially at cool and moderate temperatures. This may have implications for the reproductive potential of these cultivars when grown in north temperate areas where high temperatures are common for most of the summer.

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