Effects of photoperiod and temperature on sugars and fructans in leaf blades, leaf sheaths and stems, and roots in relation to growth of <i>Poa pratensis</i>

Solhaug, Knut Asbjørn

doi:10.1111/j.1399-3054.1991.tb00077.x

Cited by 21 publications

(22 citation statements)

References 25 publications

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“…It is generally accepted that fructans accumulate under conditions that favor photosynthesis but not growth. Poa pratensis accumulates more fructans under SD than in LD without increases in the relative growth rates (Solhaug 1991). According to Solhaug (1991), the rapid increases in growth of this species in the LD plants compared with the SD plants is associated with allocation of more assimilates to leaf blade growth in LD, and to storage as fructans in SD.…”

Section: Discussionmentioning

confidence: 99%

“…Poa pratensis accumulates more fructans under SD than in LD without increases in the relative growth rates (Solhaug 1991). According to Solhaug (1991), the rapid increases in growth of this species in the LD plants compared with the SD plants is associated with allocation of more assimilates to leaf blade growth in LD, and to storage as fructans in SD. Our growth analysis showed that the longer the photoperiod, the higher the growth rate of D. antarctica in both control and cold‐acclimation conditions.…”

Section: Discussionmentioning

confidence: 99%

“…For this reason, plants under MD and LD conditions received a higher total photosynthetic active radiation than the SD plants during the period of the experiments. MD‐ and LD‐treated plants had more time for photosynthesis and more assimilates to divert for growth than SD‐treated plants (Solhaug 1991). The higher concentration in total carbohydrates achieved during cold acclimation in the MD‐ and LD‐treated plants in relation to SD‐treated plants is also consistent with this explanation.…”

Section: Discussionmentioning

confidence: 99%

“…Grasses from cold regions are usually characterized by accumulation of fructans of a high degree of polymerization (DP) (Solhaug 1991; Solhaug and Aares 1994). Fructans with different molecular masss occur in temperate grasses with different levels of cold hardiness (Suzuki 1989).…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Cold resistance in Antarctic angiosperms

Bravo¹,

Ulloa²,

Zúñiga³

et al. 2001

Physiologia Plantarum

124

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Deschampsia antarctica Desv. (Poaceae) and Colobanthus quitensis (Kunth) Bartl. (Cariophyllaceae) are the only two vascular plants that have colonized the Maritime Antarctic. The primary purpose of the present work was to determine cold resistance mechanisms in these two Antarctic plants. This was achieved by comparing thermal properties of leaves and the lethal freezing temperature to 50% of the tissue (LT50). The grass D. antarctica was able to tolerate freezing to a lower temperature than C. quitensis. The main freezing resistance mechanism for C. quitensis is supercooling. Thus, the grass is mainly a freezing‐tolerant species, while C. quitensis avoids freezing. D. antarctica cold acclimated; thus, reducing its LT50. C. quitensis showed little cold‐acclimation capacity. Because day length is highly variable in the Antarctic, the effect of day length on freezing tolerance, growth, various soluble carbohydrates, starch, and proline contents in leaves of D. antarctica growing in the laboratory under cold‐acclimation conditions was studied. During the cold‐acclimation treatment, the LT50 was lowered more effectively under long day (21/3 h light/dark) and medium day (16/8) light periods than under a short day period (8/16). The longer the day length treatment, the faster the growth rate for both acclimated and non‐acclimated plants. Similarly, the longer the day treatment during cold acclimation, the higher the sucrose content (up to 7‐fold with respect to non‐acclimated control values). Oligo and polyfructans accumulated significantly during cold acclimation only with the medium day length treatment. Oligofructans accounted for more than 80% of total fructans. The degrees of polymerization were mostly between 3 and 10. C. quitensis under cold acclimation accumulated a similar amount of sucrose than D. antarctica, but no fructans were detected. The suggestion that survival of Antarctic plants in the Antarctic could be at least partially explained by accumulation of these substances is discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Cold resistance in Antarctic angiosperms

Bravo¹,

Ulloa²,

Zúñiga³

et al. 2001

Physiologia Plantarum

124

View full text Add to dashboard Cite

show abstract

“…With respect to the association of growth and fructans, it is generally accepted that fructans accumulate under conditions that favour photosynthesis but not growth, as demonstrated in Poa pratensis growing under SD with respect to LD conditions, where growth rates are higher and fructan contents lower (Solhaug 1991). According to this author, the increases in growth of this species in the long day treatment, compared with the short day treatments, is associated with allocation of more assimilates to leaf blade growth in LD and to storage as fructans in the SD.…”

Section: Introductionmentioning

confidence: 99%

Ecophysiology of Antarctic vascular plants

Alberdi

Bravo

Gutiérrez

et al. 2002

Physiologia Plantarum

165

120

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Most of the ice and snow-free land in the Antarctic summer is found along the Antarctic Peninsula and adjacent islands and coastal areas of the continent. This is the area where most of the Antarctic vegetation is found. Mean air temperature tends to be above zero during the summer in parts of the Maritime Antarctic. The most commonly found photosynthetic organisms in the Maritime Antarctic and continental edge are lichens (around 380 species) and bryophytes (130 species). Only two vascular plants, Deschampsia antarctica Desv. and Colobanthus quitensis (Kunth) Bartl., have been able to colonize some of the coastal areas. This low species diversity, compared with the Arctic, may be due to permanent low temperature and isolation from continental sources of propagules. The existence of these plants in such a permanent harsh environment makes them of particular interest for the study of adaptations to cold environments and mechanisms of cold resistance in plants. Among these adaptations are high freezing resistance, high resistance to light stress and high photosynthetic capacity at low temperature. In this paper, the ecophysiology of the two vascular plants is reviewed, including habitat characteristics, photosynthetic properties, cold resistance, and biochemical adaptations to cold.

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ToColdlyGo Where No Grass has Gone Before: A Multidisciplinary Review of Cold Adaptation in Poaceae

Schubert

Humphreys

Lindberg

et al. 2020

Annual Plant Reviews Online

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The grass family Poaceae is among the largest and most successful plant families, both ecologically and economically. It covers a wide geographic, climatic, and ecological range and contains many of the world's most important crops including wheat, barley, rice, maize, and sorghum, as well as many forage and biofuel species. Both wild and cultivated grasses are diverse in areas that regularly experience cold and freezing as well as high seasonality, harsh winters, and short growing seasons. Grasses growing in these environments have evolved an arsenal of strategies to tolerate or resist cold stress, or to escape the cold by phenological adjustments. Here, we review the current knowledge of cold adaptations in grasses synthesising across the disciplines of stress physiology, genetics, metabolomics, ecology, and evolution, in both wild and cultivated species. Specifically, we explore what is known about molecular and physiological cold stress responses, how these might have evolved and their role in shaping diversification and distribution patterns of grasses. We argue that integrating insights from multiple disciplines will further our understanding of cold adaptation.

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Effects of photoperiod and temperature on sugars and fructans in leaf blades, leaf sheaths and stems, and roots in relation to growth of Poa pratensis

Cited by 21 publications

References 25 publications

Cold resistance in Antarctic angiosperms

Cold resistance in Antarctic angiosperms

Ecophysiology of Antarctic vascular plants

ToColdlyGo Where No Grass has Gone Before: A Multidisciplinary Review of Cold Adaptation in Poaceae

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