Comparisons of Morphological Variation and Cellular Osmotic Potential Adjustment between Invasive Species <em>Alternanthera philoxeroides</em> and its Native Congener <em>A. sessilis</em> under Different Water Treatments

GAO Le-Xuan

doi:10.11913/PSJ.2095-0837.2015.20195

Plant Science Journal > 2015 > 33(2): 195-202. > DOI: 10.11913/PSJ.2095-0837.2015.20195 CSTR: 32231.14.PSJ.2095-0837.2015.20195

GAO Le-Xuan. Comparisons of Morphological Variation and Cellular Osmotic Potential Adjustment between Invasive Species Alternanthera philoxeroides and its Native Congener A. sessilis under Different Water Treatments[J]. Plant Science Journal, 2015, 33(2): 195-202. DOI: 10.11913/PSJ.2095-0837.2015.20195

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Comparisons of Morphological Variation and Cellular Osmotic Potential Adjustment between Invasive Species Alternanthera philoxeroides and its Native Congener A. sessilis under Different Water Treatments

GAO Le-Xuan

Shanghai Key Laboratory of Plant Functional Genomics and Resources, Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences, Shanghai Chenshan Botanical Garden, Shanghai 201602, China

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Received Date: November 27, 2014
Available Online: October 31, 2022
Published Date: April 27, 2015

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Abstract

Abstract

To understand the mechanisms underpinning the invasion of Alternanthera philoxeroides (Mart.) Griseb. in diverse water regimes, we compared its morphological traits, osmotic potential and methionine synthase (MS) gene expression with its native congener A. sessilis (Linn.) DC., which mainly occurs in moist terrestrial habitats in China. Results showed that A. philoxeroides exhibited greater phenotypic plasticity and possessed a more effective mechanism for osmotic adjustment than that of A. sessilis. The MS gene exhibited an ‘up-down’ expression pattern in A. philoxeroides: its mRNA levels increased during the first 3 hours of flooding treatments and then fell rapidly thereafter. Thus, higher flexibility in the internal environment and gene expression adjustment may play an important role in the rapid responses of A. philoxeroides to water regime changes, which are associated with its invasiveness.

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Comparisons of Morphological Variation and Cellular Osmotic Potential Adjustment between Invasive Species Alternanthera philoxeroides and its Native Congener A. sessilis under Different Water Treatments

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