+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Physiological benefits of stem curling for resurrection plants in the field



Physiological benefits of stem curling for resurrection plants in the field



Ecology (Washington D C) 74(4): 1073-1080



The stems of the resurrection plant Selaginella lepidophylla, a poikilohydrous desert pteridophyte, curl dramatically as the plants dry and uncurl when rewetted. We tested the hypothesis that stem curling is a morphological feature that may serve to limit bright-light and/or thermal damage in resurrection plants with a field experiment at a Chihuahuan desert site in west Texas (USA). Experimental plants were irrigated for 3 d and then permitted to dry. The plants were either allowed to curl normally or mechancially restrained to prevent curling and either shaded (10% of ambient irradiance) or left fully exposed during desiccation. Nine days after complete desiccation, the plants were harvested and returned to the laboratory. When rehydrated, plants that had been unshaded and restrained from curling during field desiccation had significantly lower photosystem II electron transport rates, higher intrinsic chlorophyll fluorescence (F-o) yields, lower variable to maximum chlorophyll fluorescence (F-v/F-m) yield ratios, lower chlorophyll contents, and both lower whole-plant photosynthetic quantum efficiencies and light-saturated CO-2 assimilation rates relative to plants from the other desiccation treatments. The results of both low-irradiance and high-irradiance hydrations in the laboratory suggest that the curling during desiccation and the uncurling during rehydration of S. lepidophylla in its natural habitat serves to protect the plant from damage due to high irradiance, high temperature, or perhaps a synergistic combination of the two. This protection permits the rapid recovery of photosynthetic competence when next the plants are wetted, thereby helping to maximize net carbon balance over time.

(PDF emailed within 0-6 h: $19.90)

Accession: 009196344

Download citation: RISBibTeXText

DOI: 10.2307/1940477


Related references

Reduced photoinhibition with stem curling in the resurrection plant selaginella lepidophylla. Oecologia 88(4): 597-604, 1991

Investigation of physiological differences in hop plants affected by curling and the relationship between this disease and soil chemistry.. Sborn csl Akad. zemed. Ved. (Rosti. Vyroba), 3; XXX: 829-848, 1957

Prevention of high irradiance damage with stem curling in selaginella lepidophylla a field experiment. Bulletin of the Ecological Society of America 72(2 SUPPL): 171, 1991

Desiccation induced plant curling and high irradiance damage in the desert resurrection plant selaginella lepidophylla. Bulletin of the Ecological Society of America 71(2 SUPPL): 227, 1990

The signature of seeds in resurrection plants: a molecular and physiological comparison of desiccation tolerance in seeds and vegetative tissues. Integrative and Comparative Biology 45(5): 771-787, 2005

Physiological peculiarities of long-stem and short-stem sunf lower plants. 1974

Physiological characteristics of long stem and short stem sunflower plants. Fiziologiya Rastenii (moscow): 893-899, 1974

Genetic and physiological compatibility of various forms of stem nematodes part 6 crossing of stem eelworms from cultivated plants and weeds. Parazitologiya (Stsburg). 1978; 12(4): 349-353, 1978

The quantitative assessment of the benefits of physiological integration in clonal plants. Evolutionary Ecology Research 4(8): 1153-1176, 2002

The physiological significance of I for plants and the influence of I fertilizers on yields of field crops and horticultural plants. Gartenbauwiss (1): 71-80, 1928

Physiological benefits of forest environment: based on field research at 4 sites. Nihon Eiseigaku Zasshi. Japanese Journal of Hygiene 66(4): 663-669, 2011

Resurrection plants as model systems to study desiccation tolerance in higher plants. Biotechnology for aridland plants: 47-58, 1993

Programming desiccation-tolerance: from plants to seeds to resurrection plants. Current Opinion in Plant Biology 14(3): 340-345, 2012

On genetic and physiological compatibility of various forms of stem eelworms. 6. Crossing of stem eelworms from cultivated and undesirable plants. Parazitologiya (St. Petersburg): 124: 349-353, 1978

Skin benefits of a myconoside-rich extract from resurrection plant Haberlea rhodopensis. International Journal of Cosmetic Science 34(2): 132-139, 2012