LOW TEMPERATURE RESPONSE OF CHLOROPLAST THYLAKOIDS

1979 ◽  
pp. 203-214 ◽  
Author(s):  
M.P. Garber
Keyword(s):  
Low Temperature ◽  
Temperature Response

scholarly journals Comparative transcriptome analysis of the cold resistance of the sterile rice line 33S

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0261822
Author(s):  
Hongjun Xie ◽  
Mingdong Zhu ◽  
Yaying Yu ◽  
Xiaoshan Zeng ◽  
Guohua Tang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cold Resistance ◽  
Temperature Response ◽  
Enrichment Analysis ◽  
Abiotic Factor ◽  
Comparative Transcriptome ◽  
Important Species ◽  
Expression Of Genes ◽  
Nutrient Reserve ◽  
Cold Tolerant

Rice (Oryza sativa L.) is one of the most important species for food production worldwide. Low temperature is a major abiotic factor that affects rice germination and reproduction. Here, the underlying regulatory mechanism in seedlings of a TGMS variety (33S) and a cold-sensitive variety (Nipponbare) was investigated by comparative transcriptome. There were 795 differentially expressed genes (DEGs) identified only in cold-treated 33S, suggesting that 33S had a unique cold-resistance system. Functional and enrichment analysis of these DEGs revealed that, in 33S, several metabolic pathways, such as photosynthesis, amino acid metabolism, secondary metabolite biosynthesis, were significantly repressed. Moreover, pathways related to growth and development, including starch and sucrose metabolism, and DNA biosynthesis and damage response/repair, were significantly enhanced. The expression of genes related to nutrient reserve activity were significantly up-regulated in 33S. Finally, three NAC and several ERF transcription factors were predicted to be important in this transcriptional reprogramming. This present work provides valuable information for future investigations of low-temperature response mechanisms and genetic improvement of cold-tolerant rice seedlings.

Temperature Regulation of the Development of Frost Hardiness in Pinus radiata D. Don

1983 ◽  
Vol 10 (6) ◽  
pp. 539 ◽  
Author(s):  
DH Greer
Keyword(s):  
Low Temperature ◽  
Temperature Response ◽  
Frost Hardiness ◽  
Natural Environments ◽  
Response Model ◽  
Night Temperature ◽  
Rate Of Development ◽  
Relative Contribution ◽  
Hardening Process ◽  
Hardening Treatment

The development of frost hardiness in seedlings of P. radiata was followed using a photoperiod of 9 h and a constant day temperature of 12°C. The seedlings were preconditioned to a night temperature of 6.5°C for 35 days and 4°C for 7 days. The temperature was then reduced to -4°C for 66 days in one hardening treatment (designated 12/-4°C) and to 3°C for 136 days in another (designated 12/3°C). At the end of those periods, the night temperature was increased back to 6.5°C for a further 15 days. Frost hardiness was determined at regular intervals by exposing the seedlings to a series of artificial frosts. During the low temperature regime, frost hardiness developed continuously in seedlings from both treatments, from -5 to -9.5°C in the 12/3°C treatment and to -16.5°C in the 12/-4°C treatment. The rate of development of frost hardiness was constant at constant temperatures. Using a temperature response model, specific rates of hardening were estimated for both this and an earlier experiment, and found to be approximately linear against temperature. The analysis establishes that temperature controls the hardening process of P. radiata by regulating the rate of development of frost hardiness. Frost hardiness was also shown to be related to thermal time. Before this relationship could be useful in predicting frost hardiness of field-grown seedlings, the relative contribution of the photoperiod-induced and temperature-induced hardening in natural environments needs to be more clearly defined.

Low temperature effects on growth and physiology specific to a "grass-clump" dwarf wheat hybrid

1972 ◽  
Vol 50 (2) ◽  
pp. 253-261 ◽  
Author(s):  
J. D. Mahon ◽  
D. T. Canvin
Keyword(s):  
Low Temperature ◽  
Shoot Growth ◽  
Growth Habit ◽  
Temperature Response ◽  
Dry Weight ◽  
Growth Responses ◽  
Meristematic Region ◽  
Meristematic Activity ◽  
Dwarf Wheat ◽  
Induced Changes

The growth habit of "grass-clump" dwarf wheat plants can be affected by extremely short 16° treatments if given repeatedly. To localize the earliest growth responses in plants of one such hybrid (Mql × KF 1), the temperature sensitivity of plants of different ages, and the earliest temperature-induced changes in growth, development, and shoot physiology were investigated and compared with the responses of normal wheat plants.Mql × KF 1 plants growing at 26° responded to progressively shorter 16° treatments as they aged and plants exposed to 16° after 10 days growth at 26° were unable to recover from low temperature treatments of 3–5 days duration. Although shoot growth (as dry weight) of Mql × KF 1 stopped abruptly after 7 days at 16°, root growth (as dry weight) continued for at least 15 days. The rates of CO2 and water vapor exchange in individual leaves responded to low temperature similarly in both the dwarf and normal plants and did not markedly decrease until after 4 days at 16°. The most rapid low temperature response specific to Mql × KF 1 plants was cessation in primary tiller development immediately after the beginning of 16° exposure. It is proposed that the primary 16° effect is on the shoot meristematic region and that other changes in growth and physiology result from the lack of meristematic activity in the young growing region.

Low-Temperature-Induced GA3 Sensitivity of Wheat. III. Comparison of Low Temperature Effects on α-Amylase Production by Aleurone Tissue of Dwarf and Tall Wheat

1985 ◽  
Vol 12 (3) ◽  
pp. 269 ◽  
Author(s):  
SP Singh ◽  
LG Paleg
Keyword(s):  
Low Temperature ◽  
Gibberellic Acid ◽  
Temperature Effects ◽  
Temperature Response ◽  
Lag Time ◽  
Receptor Sites ◽  
Amylase Production ◽  
Aleurone Tissue ◽  
Temperature Exposure ◽  
Low Temperature Exposure

The low temperature effect on the gibberellic acid (GA3) sensitivity (measured as a-amylase production) of aleurone tissue or deembryonated seed of dwarf and tall wheat (F6 Rht 3/rht 3 isogenic lines) was studied. The results indicated that the low-temperature-induced increase in GA3 response is: quantitative and temporal; GA3 concentration-dependent; without effect on the lag-time of a-amylase production, and operative in the aleurone tissue of dwarf (Rht 3-containing) wheat. All these characteristics of the low temperature response of the Rht 3-containing aleurone tissue are similar to those reported earlier for Rht 1-containing and Rht 2-containing aleurone tissue. The present results support the hypothesis that low temperature exposure is able to cure or reverse the genetic lesions manifest in the aleurone tissue containing the Rht allele and that this may be mediated via an increase in GA3 receptor sites.

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