气候变化领域集成服务门户(CCPortal): Morphological and Physiological Responses of Two Penstemon Species to Saline Water Irrigation

CCPortal

DOI	10.21273/HORTSCI17454-23
	Morphological and Physiological Responses of Two Penstemon Species to Saline Water Irrigation
	Nepal, Prakriti; Wang, Zirui; Carnahan, Mckenna; Maughan, Wes; Hershkowitz, Julie; Sun, Youping; Paudel, Asmita; Forsyth, Kyle; Volesky, Nick; Devkota, Ananta Raj; Chen, Ji Jhong
发表日期	2024
ISSN	0018-5345
EISSN	2327-9834
起始页码	59
结束页码	5
卷号	59 期号:5
英文摘要	Penstemon, with more than 250 species native to North America, holds signi fi cant aesthetic and ecological value in Utah, supporting diverse pollinators. Despite their signi fi cance, the survival of penstemon is threatened by challenges such as habitat loss, climate change, and Utah ' s naturally high soil salinity. To address these challenges and understand their adaptability, this study evaluated the salt tolerance of two penstemon species [ Penstemon davidsonii (Davidson ' s penstemon) and Penstemon heterophyllus (foothill penstemon)] under controlled greenhouse conditions. The aim was to develop baseline information for nursery production and landscape use that utilize reclaimed water for irrigation. Plants were irrigated weekly with a nutrient solution at an electrical conductivity (EC) of 1.0 dSm - 1 as control or a saline solution at an EC of 2.5, 5.0, 7.5, or 10.0 dSm - 1 for 8 weeks. Half of the plants were harvested after four irrigation events, and the remaining plants were harvested after eight irrigation events. At harvest, visual rating (0 = dead and 5 = excellent without foliage salt damage), plant width, number of shoots, leaf area, shoot dry weight, leaf greenness [Soil Plant Analysis Development (SPAD)], stomatal conductance, and canopy temperature were collected to assess the impact of salinity stress. In both species, salt damage was dependent on the salinity levels and length of exposure. After four irrigation events, both species exhibited foliage damage that increased in severity with rising EC. The most severe damage was observed in plants receiving saline solution at an EC of 10.0 dSm - 1 . After eight irrigation events, P. davidsonii exposed to a saline solution with an EC of 10.0 dSm - 1 received a visual rating of 0, whereas P. heterophyllus had a visual rating of 0.4. Both species exhibited salinity -induced effects, with variations observed in the speci fi c parameters and the degree of response. Penstemon davidsonii exhibited signi fi - cant salinity stress, as indicated by reduced leaf area, shoot dry weight, SPAD reading, and stomatal conductance with increasing EC of the saline solution. In addition, in both species, at both harvests, canopy temperatures increased either linearly or quadratically by 8% to 36% as the EC levels of the saline solution increased. These results indicate that P. davidsonii was more sensitive to salinity stress than P. heterophyllus .
英文关键词	canopy temperature; Penstemon davidsonii (Davidson ' s penstemon); Penstemon heterophyllus (foothill penstemon); salinity; stomatal conductance; visual quality
语种	英语
WOS研究方向	Agriculture
WOS类目	Horticulture
WOS记录号	WOS:001221793800009
来源期刊	HORTSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/306013
作者单位	Utah System of Higher Education; Utah State University; Washington State University; University of Wyoming
推荐引用方式 GB/T 7714	Nepal, Prakriti,Wang, Zirui,Carnahan, Mckenna,et al. Morphological and Physiological Responses of Two Penstemon Species to Saline Water Irrigation[J],2024,59(5).
APA	Nepal, Prakriti.,Wang, Zirui.,Carnahan, Mckenna.,Maughan, Wes.,Hershkowitz, Julie.,...&Chen, Ji Jhong.(2024).Morphological and Physiological Responses of Two Penstemon Species to Saline Water Irrigation.HORTSCIENCE,59(5).
MLA	Nepal, Prakriti,et al."Morphological and Physiological Responses of Two Penstemon Species to Saline Water Irrigation".HORTSCIENCE 59.5(2024).