Growth and physiological response of an endangered tree, Horsfieldia hainanensis merr., to simulated sulfuric and nitric acid rain in southern China

Publication date: Available online 20 September 2019Source: Plant Physiology and BiochemistryAuthor(s): Jie Huang, Hanyue Wang, Yuduan Zhong, Jinggui Huang, Xiaofeng Fu, Linghui Wang, Weichao TengAbstractAs nitrogen deposition increases, acid rain is gradually shifting from sulfuric acid rain (SAR) to nitric acid rain (NAR). Acid rain can severely affect plant growth, damage ecosystems, and reduce biodiversity. Thus, a shift in acid rain type presents another challenge to the conservation of endangered plant species. We investigated the effect of three acid rain types (SAR, mixed acid rain [MAR], and NAR) and pH on the growth of an endangered Chinese endemic tree, Horsfieldia hainanensis Merr., using simulated rain in a greenhouse environment. Over nine months, growth indices, chlorophyll content, antioxidant enzyme activity, malondialdehyde content, and chlorophyll fluorescence parameters were investigated for treated and control saplings. The results indicated that at a pH of 5.6, H. hainanensis could adapt to SAR and MAR, but NAR inhibited below-ground growth. At a pH of 2.5 and 4.0, SAR inhibited stem and leaf biomass accumulation, whereas NAR inhibited root biomass accumulation and altered root morphology. MAR had intermediary effects between those of SAR and NAR. Adverse effects on leaf physiology were reduced as the rain type shifted from SAR to NAR; however, roots were increasingly adversely affected. Our results suggest that conservation efforts for H. hainanensis sh...
Source: Plant Physiology and Biochemistry - Category: Biochemistry Source Type: research

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Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
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Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
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Source: Journal of Hospital Infection - Category: Infectious Diseases Source Type: research
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Source: The Pediatric Infectious Disease Journal - Category: Infectious Diseases Tags: Original Studies Source Type: research
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Source: Molecular and Biochemical Parasitology - Category: Parasitology Source Type: research
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Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
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Source: Journal of Medical Mycology - Category: Biology Source Type: research
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Source: Journal of Medical Mycology - Category: Biology Source Type: research
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Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized Comedy HealthSummit19 onetime Source Type: news
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