干旱区生态环境知识资源中心(Arid): Prehydration mitigates damage accrued from prolonged periods of desiccation in cultured shoot apices of Syntrichia ruralis

Arid

DOI	10.1080/03736687.2020.1833157
	Prehydration mitigates damage accrued from prolonged periods of desiccation in cultured shoot apices of Syntrichia ruralis
	Slate, Mandy L.; Brinda, John C.; Coe, Kirsten K.; Greenwood, Joshua L.; Stark, Lloyd R.
通讯作者	Stark, LR (corresponding author), Univ Nevada, Sch Life Sci, 4505 Maryland Pkwy, Las Vegas, NV 89154 USA.
来源期刊	JOURNAL OF BRYOLOGY
ISSN	0373-6687
EISSN	1743-2820
出版年	2021
英文摘要	Introduction. We hypothesised that a prehydration period (exposure to humid air) should mitigate the damaging effects of short or long periods of desiccation in a desert moss, Syntrichia ruralis. Methods. Cultured uniclonal shoots of S. ruralis were dried rapidly, equilibrated at 42% relative humidity (RH), allowed to remain at this RH for 1-50 days, and either (1) prehydrated (24 h at 100% RH) then rehydrated with liquid water, or (2) rehydrated directly using liquid water without a prehydration treatment, and assessed using chlorophyll fluorescence and visual damage. Key results. At both 20 min and 24 h postrehydration, all chlorophyll fluorescence measures (F (m), F (v)/F (m), phi(PSII), qP) were higher in shoots that were prehydrated. Prehydrated S. ruralis shoots also had less visual leaf damage 7 d postrehydration. Duration-dry (DD) had an overall negative effect for all fluorescence measures on shoots immediately after rehydration, an effect that dissipated at 24 h postrehydration in three of the four fluorescence measures (F (m), F (v)/F (m), phi(PSII)). Leaf damage was not influenced by Duration-dry. Although no interaction was detected between Prehydration and Duration-dry treatments, the benefits of prehydration were accentuated based on fluorescence metrics F (v)/F (m) and phi(PSII), when shoots are exposed to longer drying periods. Conclusions. A prehydration treatment implemented just prior to hydration with liquid water significantly mitigated shoot damage accrued from a prior rapid drying event and DDs of up to 50 d at 42% RH. Based on photosynthetic efficiency, prehydration conferred greater effects at longer DDs. Experiencing humid conditions prior to rainwater mitigates damage incurred during prolonged desiccation.
英文关键词	Chlorophyll fluorescence constitutive desiccation tolerance equilibrating relative humidity inducible suprasaturation
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000600701400001
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352315
作者单位	[Slate, Mandy L.] Univ Colorado, Dept Ecol & Evolutionary Biol, Boulder, CO 80307 USA; [Brinda, John C.] Bryophyte Herbarium, Missouri Bot Garden, 4344 Shaw Blvd, St Louis, MO 63110 USA; [Coe, Kirsten K.] Middlebury Coll, Dept Biol, Middlebury, VT 05753 USA; [Greenwood, Joshua L.; Stark, Lloyd R.] Univ Nevada, Sch Life Sci, 4505 Maryland Pkwy, Las Vegas, NV 89154 USA
推荐引用方式 GB/T 7714	Slate, Mandy L.,Brinda, John C.,Coe, Kirsten K.,et al. Prehydration mitigates damage accrued from prolonged periods of desiccation in cultured shoot apices of Syntrichia ruralis[J],2021.
APA	Slate, Mandy L.,Brinda, John C.,Coe, Kirsten K.,Greenwood, Joshua L.,&Stark, Lloyd R..(2021).Prehydration mitigates damage accrued from prolonged periods of desiccation in cultured shoot apices of Syntrichia ruralis.JOURNAL OF BRYOLOGY.
MLA	Slate, Mandy L.,et al."Prehydration mitigates damage accrued from prolonged periods of desiccation in cultured shoot apices of Syntrichia ruralis".JOURNAL OF BRYOLOGY (2021).