scholarly journals To dry perchance to live: Insights from the genome of the desiccation‐tolerant biocrust moss Syntrichia caninervis

2020 ◽  
Author(s):  
Anderson T. Silva ◽  
Bei Gao ◽  
Kirsten M. Fisher ◽  
Brent D. Mishler ◽  
Jenna T. B. Ekwealor ◽  
...  
Keyword(s):  
Syntrichia Caninervis

Natural ultraviolet radiation exposure alters photosynthetic biology and improves recovery from desiccation in a desert moss

2021 ◽  
Author(s):  
Jenna T B Ekwealor ◽  
Theresa A Clark ◽  
Oliver Dautermann ◽  
Alexander Russell ◽  
Sotodeh Ebrahimi ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Thermal Quenching ◽  
Photochemical Quenching ◽  
Seasonal Fluctuations ◽  
Syntrichia Caninervis ◽  
Ultraviolet Radiation Exposure ◽  
Dryland Ecosystems ◽  
Solar Uv ◽  
Non Photochemical Quenching

Abstract Plants in dryland ecosystems experience extreme daily and seasonal fluctuations in light, temperature, and water availability. We used an in situ field experiment to uncover the effects of natural and reduced levels of ultraviolet radiation (UV) on maximum PSII quantum efficiency (Fv/Fm), relative abundance of photosynthetic pigments and antioxidants, and the transcriptome in the desiccation-tolerant desert moss Syntrichia caninervis. We tested the hypotheses that: (i) S. caninervis plants undergo sustained thermal quenching of light [non-photochemical quenching (NPQ)] while desiccated and after rehydration; (ii) a reduction of UV will result in improved recovery of Fv/Fm; but (iii) 1 year of UV removal will de-harden plants and increase vulnerability to UV damage, indicated by a reduction in Fv/Fm. All field-collected plants had extremely low Fv/Fm after initial rehydration but recovered over 8 d in lab-simulated winter conditions. UV-filtered plants had lower Fv/Fm during recovery, higher concentrations of photoprotective pigments and antioxidants such as zeaxanthin and tocopherols, and lower concentrations of neoxanthin and Chl b than plants exposed to near natural UV levels. Field-grown S. caninervis underwent sustained NPQ that took days to relax and for efficient photosynthesis to resume. Reduction of solar UV radiation adversely affected recovery of Fv/Fm following rehydration.

Detection of abscisic acid and relative transcript abundance in Syntrichia caninervis Mitt.

2021 ◽  
pp. 1-8
Author(s):  
Yigong Zhang ◽  
Ayibaiheremu Mutailifu ◽  
Yi Zhang ◽  
Honglan Yang ◽  
Daoyuan Zhang
Keyword(s):  
Abscisic Acid ◽  
Transcript Abundance ◽  
Syntrichia Caninervis ◽  
Relative Transcript Abundance

Freeze-thaw cycles change the physiological sensitivity of Syntrichia caninervis to snow cover

2021 ◽  
Vol 266 ◽  
pp. 153528
Author(s):  
Benfeng Yin ◽  
Jiwen Li ◽  
Qing Zhang ◽  
Nan Wu ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Snow Cover ◽  
Freeze Thaw ◽  
Syntrichia Caninervis

Photosynthetic and cytological recovery on remoistening Syntrichia caninervis Mitt., a desiccation-tolerant moss from Northwestern China

2011 ◽  
Vol 49 (1) ◽  
pp. 13-20 ◽  
Author(s):  
J. Zhang ◽  
Y. M. Zhang ◽  
A. Downing ◽  
N. Wu ◽  
B. C. Zhang
Keyword(s):  
Northwestern China ◽  
Syntrichia Caninervis

Rapid adjustment of leaf angle explains how the desert moss, Syntrichia caninervis, copes with multiple resource limitations during rehydration

2014 ◽  
Vol 41 (2) ◽  
pp. 168 ◽  
Author(s):  
Nan Wu ◽  
Yuan-ming Zhang ◽  
Alison Downing ◽  
Zachary T. Aanderud ◽  
Ye Tao ◽  
...  
Keyword(s):  
Light Availability ◽  
Morphological Characters ◽  
Ultrastructural Changes ◽  
Leaf Angle ◽  
Resource Limitations ◽  
Syntrichia Caninervis ◽  
Relative Water ◽  
Rapid Adjustment ◽  
Multiple Resource ◽  
Water Gain

Although the desert moss Syntrichia caninervis Mitt. is extremely desiccation tolerant, it still requires water and photosynthates for growth. The ecological significance of the leaf angle in maintaining a balance between water and light availability is critical to its survival. Active leaf repositioning balances water and light availability following rehydration. S. caninervis can adjust leaf angles from a steep (84–69°) to a stable level at 30° within 7 s after rehydration, obtaining maximum net photosynthetic gain at a shoot relative water content of ~60%. Leaf morphological characters, (leaf hair points, surface papillae and costal anatomy) and ultrastructural changes (chloroplast reordering and loss of lipid reserves as shown by changes in osmiophilic globules) were linked to rapid leaf spreading, water gain and sunlight reflectivity of leaves during rehydration. The high 377.20 ± 91.69 (cm2 g–1) surface area to mass ratio was a major factor in facilitating the rapid response to rewetting. Hyaline cells of the leaf base absorbed water, swelled and forced the leaf away from the stem as soon as rehydration commenced. Loss of leaf hair points retards leaf angle adjustment during rehydration.

The effects of drying following heat shock exposure of the desert moss Syntrichia caninervis

2009 ◽  
Vol 407 (7) ◽  
pp. 2411-2419 ◽  
Author(s):  
Shu-jun Xu ◽  
Chun-jiang Liu ◽  
Ping-an Jiang ◽  
Wei-min Cai ◽  
Yan Wang
Keyword(s):  
Heat Shock ◽  
Syntrichia Caninervis ◽  
Shock Exposure

ScDREB8, a novel A-5 type of DREB gene in the desert moss Syntrichia caninervis, confers salt tolerance to Arabidopsis

2017 ◽  
Vol 120 ◽  
pp. 242-251 ◽  
Author(s):  
Yuqing Liang ◽  
Xiaoshuang Li ◽  
Daoyuan Zhang ◽  
Bei Gao ◽  
Honglan Yang ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Syntrichia Caninervis ◽  
Dreb Gene
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