Growth analyses of tomato genotypes grown under low night temperatures and low light intensity

Smeets, L.; Garretsen, Frida

doi:10.1007/bf00028578

Cited by 40 publications

(33 citation statements)

References 16 publications

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“…The SLA of varieties in the field was significantly different from the varieties in green house (P = 0.01). As the result, the leaves of S. tuberosum varieties in green house were thicker than in the field, which agrees with other findings [13,14].…”

Section: Specific Leaf Area (Sla)supporting

confidence: 92%

“…This matter caused at the beginning of growth period. LAR had decreasing trend in all S. tuberosum varieties [13,14].…”

Section: Leaf Area Ratio (Lar)mentioning

confidence: 91%

“…At the Stages after this period, the CGR was slowed down, because of reduction of pure absorption and leaves falling [7,11,12]. The increase of structural tissues in comparison to active merystemic tissues, the age of leaves, the reduction of leaf area and pure absorption and shading of upper leaves over lower leaves were all factors effecting on CGR among Solanum tuberosum varieties in the field and green house [13].…”

Section: Crop Growth Rate (Cgr)mentioning

confidence: 99%

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Analysis of Genetical Diversity of Some of the Tetraploides Potato Cultivars Grown in Iran

Esfahai¹,

Pazoki²

2012

AJPS

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The genetical diversity of potato, Solanum tuberosum was assessed using morphological traits. To verify, how this diversity is distributed among the main potato varieties grown in Iran. A total of eleven potato varieties, Ramose, Sante, Shepody, Marfona, Maradona, Milova, Santana, Boren, Cosima, Granola and Agria, were evaluated under vivo and situ experimental conditions in Isfahan, conditions, Iran. Seven phenological, floral and morphological vegetative aerial descriptors, Growth Rate = CGR, Net Assimilation Rate = NAR, Leaf Area Duration = LAD, Leaf Area Ratio = LAR and specific Leaf Area = SLA were recorded. The descriptors were evaluated by SAS Software and their means comparison by DMRT test. Certain defined groups were observed, indicating that the diversity of the cultivars are structured with a considerable morphological variation in between the varieties with a very high significant growth indices.

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Section: Specific Leaf Area (Sla)supporting

confidence: 92%

“…This matter caused at the beginning of growth period. LAR had decreasing trend in all S. tuberosum varieties [13,14].…”

Section: Leaf Area Ratio (Lar)mentioning

confidence: 91%

Section: Crop Growth Rate (Cgr)mentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Genetical Diversity of Some of the Tetraploides Potato Cultivars Grown in Iran

Esfahai¹,

Pazoki²

2012

AJPS

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“…Fruit development is also inhibited below a daily mean air temperature of 14°C (Adams et al, 2001), and no vegetative growth is expected below 12°C (Criddle et al, 1997). Under low air temperatures at night, leaf area expansion and plant growth are also restricted (Smeets and Garretsen, 1986). In contrast, the root-zone temperature is optimal at 20 to 30°C (Gosselin and Trudel, 1984;Hurewitz and Janes, 1983;Shishido and Kumakura, 1994;Tindall et al, 1990), although the optimum varies slightly among air temperatures (Gosselin and Trudel, 1983a).…”

Section: Discussionmentioning

confidence: 99%

“…For greenhouse tomato production in winter, a heating system is used to avoid the growth inhibition (Criddle et al, 1997;Hoek et al, 1993;Smeets and Garretsen, 1986) and decreased yield (Adams et al, 2001) caused by low temperatures. However, heating cost has become expensive due to soaring fossil fuel prices in recent years.…”

Section: Introductionmentioning

confidence: 99%

Effect of Root-zone Heating on Root Growth and Activity, Nutrient Uptake, and Fruit Yield of Tomato at Low Air Temperatures

Kawasaki

Matsuo

Kanayama

et al. 2014

J. Japan. Soc. Hort. Sci.

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Low-cost heating is needed to reduce chilling injuries, heating costs, and CO 2 emission during greenhouse tomato production. To acquire information about the physiological and morphological effects of root-zone heating, an economical option at low air temperatures, we grew tomato plants on a nutrient film technique hydroponic system in a heated nutrient solution. We investigated the effects of short-term root-zone heating after transplanting and long-term heating until harvest. We measured short-term plant growth, nutrient uptake, root activity (xylem exudation and root respiration rates), root indole-3-acetic acid (IAA) concentration, internal root structure, and long-term fruit weight and dry matter distribution. The minimum root-zone temperature was maintained at 16.6°C, while the minimum air temperature (5.9°C) and the minimum root-zone temperature in the control (5.8°C) were lower than optimal. After 7 days of root-zone heating, root dry weight and relative growth rate increased compared with those of the control, accompanied by increased mineral nutrient uptake and xylem exudation. These changes may explain the increased shoot growth after 21 days of heating. In roots, development of the epidermis and stele, including the xylem, was promoted by heating, in contrast to previous research on root-zone cooling at high air temperature, which promoted xylem-specific development. Although the proportion of dry matter distributed to the fruit was not changed by root-zone heating, individual fruit size and total yield were higher than in the control due to a higher total dry weight in the heating treatment. Our results suggest that root-zone heating is an effective lowcost heating technology at low air temperature because of its effects on root activity, growth, and fruit yield, but that the mechanisms may differ from those in root-zone cooling at high air temperature.

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Integrated Management of Greenhouse Vegetable Crops

Papadopoulos

Pararajasingham

Shipp

et al. 1997

Horticultural Reviews

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Growth analyses of tomato genotypes grown under low night temperatures and low light intensity

Cited by 40 publications

References 16 publications

Analysis of Genetical Diversity of Some of the Tetraploides Potato Cultivars Grown in Iran

Analysis of Genetical Diversity of Some of the Tetraploides Potato Cultivars Grown in Iran

Effect of Root-zone Heating on Root Growth and Activity, Nutrient Uptake, and Fruit Yield of Tomato at Low Air Temperatures

Integrated Management of Greenhouse Vegetable Crops

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