NDLI: Moderate shade environment facilitates establishment of desert phreatophytic species Alhagi sparsifolia seedlings by enlarge fine root biomass

Content Provider	Springer Nature Link
Author	Xue, Wei Li, Xiangyi
Copyright Year	2016
Abstract	Phreatophytic species (Alhagi sparsifolia Shap.) is commonly found to distribute in open area with full sun light environment without shading, and spontaneous occurrence of seedlings in mixed species communities is rare in arid and semi-arid regions. Seedlings and field-grown perennial plants at the southern rim of the Taklamakan Desert were grown under three light availability, i.e., full sun light, 80 and 20% of full sun light treated as high-light (HL), moderately high-light (MHL), and low-light (LL) groups. Plastic acclimation of leaf morphological and photosynthetic traits induced by low light was evident. Low-light-grown plants exhibited higher maximum photochemical efficiency (F $_{v}$/F $_{m}$) and relatively low assimilation rate (P $_{ n }$), while difference in daily P $_{ n }$ between the HL and MHL was not significant. Photosynthetic efficiency at the HL on summer midday was constrained partially due to lower quantum yield of electron transport at the primary quinone acceptors between photosystem II and I. Compared with the HL and LL, seedlings at the MHL group had larger relatively growth rate, net primary production per plant, and longer assimilative branch. Allocation proportions of biomass into root, assimilative branches, leaves, and stem, root/shoot ratio, and specific root length between the HL and MHL were, respectively, similar. However, very fine root biomass (<1 mm) was significantly enlarged by the MHL, which directly contributed to biomass production. Collectively, plant growth of A. sparsifolia favored by the MHL was mainly ascribed to rapid growth rate, photosynthetic efficiency without suffering midday stresses, and importantly to strong root system featured by enlarged fine root biomass.
Starting Page	1
Ending Page	12
Page Count	12
File Format	PDF
ISSN	01375881
Journal	Acta Physiologiae Plantarum
Volume Number	39
Issue Number	1
e-ISSN	18611664
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-11-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Phreatophytic species Fine root Photosynthesis Growth rate Shade Plant Physiology Plant Genetics & Genomics Plant Biochemistry Plant Pathology Plant Anatomy/Development Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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