Morphological and Photosynthetic Response to High and Low Irradiance of<i>Aeschynanthus longicaulis</i>

Li, Qiansheng; Deng, Min; Xiong, Yanshi; Coombes, Allen; Wang, Zhao

doi:10.1155/2014/347461

Cited by 25 publications

(18 citation statements)

References 35 publications

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“…As expected, and consistent with many previous reports (Griffin et al 2004;Li et al 2014;Mathur et al 2018), savin juniper generally had significantly lower A, g s and NPQ, and significantly higher F v /F m and ΦPSII under 10% light than 100% light, and plants exposed to 50% light had intermediate values . Plants exposed to high light often have lower F v /F m than those exposed to reduced light (Murchie & Lawson 2013).…”

Section: Gas Exchange and Chlorophyll Fluorescence Parameterssupporting

confidence: 92%

Leaf morphology, photosynthesis and pigments change with age and light regime in savin juniper

Zhang

et al. 2021

Plant Biol J

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Savin juniper is an excellent species for desertification control in arid and semi-arid areas, where it typically establishes under the protection of nurse plants. Ultimately, established plants emerge into full light as they grow, and this transition is accompanied by an increase in the preponderance of scale-like versus needle-like leaf forms.• To test how age and variable light environments affect shade tolerance in savin juniper, we established a pot study under field conditions, with two age cohorts (1-and 4-yearold rooted scions) and three light regimes (10%, 50% and 100% light transmittance). We measured growth, leaf parameters, photosynthesis, chlorophyll fluorescence and foliar pigments on a monthly basis (seven growing months per year, from 2015 to 2017).• Overall, there was little interaction among all variables, and both cohort and light regime had significant effects. Leaf form and spacing varied continuously, tending towards shorter, more closely spaced and more appressed scale leaves with higher dry leaf mass per area in older plants or under higher light. There were no clear age-related patterns in carotenoids but both cohort and light had significant effects on gas exchange and chlorophyll fluorescence variables.• We conclude that savin juniper shows an intermediate tolerance to shade that changes with growth in that younger plants were less tolerant of full sun than older plants, consistent with its reliance on nurse plants for ultimate establishment in the open.

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Section: Gas Exchange and Chlorophyll Fluorescence Parameterssupporting

confidence: 92%

Leaf morphology, photosynthesis and pigments change with age and light regime in savin juniper

Zhang

et al. 2021

Plant Biol J

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“…In this study, LL results in lower AQE, LCP, and Rd. Shading generally induces lower photosynthetic rates and LCP [52]. LCP is the level of light at which photosynthetic CO 2 fixation matches respiratory losses.…”

Section: Discussionmentioning

confidence: 99%

Low Light Alters the Photosynthesis Process in Cigar Tobacco via Modulation of the Chlorophyll Content, Chlorophyll Fluorescence, and Gene Expression

Khan

Gao

et al. 2021

Agriculture

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Shading or low light (LL) conditions are a key and necessary cultivation technique in cigar wrapper tobacco production. However, the effect of low light on the photosynthesis in cigar tobacco is not clear. Therefore, this study is designed to know the photosynthesis of cigar tobacco under different light intensities (T200, T100, and T50 μmol m−2 s−1). The results reveal that under low light, T50 especially improved the light interception and increased carbon utilization, as witnessed by a higher specific leaf area and lower specific leaf weight. Low light intensity caused better light interception and carbon utilization in cigar tobacco leaves, and thus thinner leaves are more able to use low light efficiently. The chlorophyll content is related to the photosynthesis process; thus, LL affected the photosynthesis process by lowering the chlorophyll content. Similarly, LL also altered the photosynthetic efficiency by lowering the QY_Lss, qP_Lss, and Rfd_Lss. Additionally, higher expression of Lhcb4.2, Lhcb6, PsbA, PsbB, and PsbD under low light, especially T50, shows that the PSII and antenna proteins complex efficiently utilized the absorbed energy for photosynthesis. Finally, the lower photosynthesis, particularly in T50, is attributed to the downregulation of genes related to NADPH production (petH) and the rubisco enzyme synthesis-related gene (rbcs) for CO2 fixation in the Calvin cycle. Overall, the results show that the photosynthesis is decreased under LL intensities which might be related to lower chlorophyll content and downregulation of petH and rbcs genes.

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“…moupinensis [ 39 ]. This lower LSP and higher LCP might reveal an adaptive evolutionary trait of plants under higher irradiance [ 40 ]. Based on Maxent modeling, we found that the niche breadth of diploid Fragaria plants was considerably larger than that of tetraploid Fragaria plants and that the tetraploid plants were likely to grow in regions of higher altitude (unpublished data).…”

Section: Discussionmentioning

confidence: 99%

Effects of ploidy level and haplotype on variation of photosynthetic traits: Novel evidence from two Fragaria species

et al. 2017

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To reveal the effects of ploidy level and haplotype on photosynthetic traits, we chose 175 genotypes of wild strawberries belonging to two haplotypes at two types of ploidy levels (diploidy and tetraploidy) and measured photosynthetic traits. Our results revealed that ploidy significantly affected the characteristics of light-response curves, CO2-response curves, and leaf gas exchange parameters, except intercellular CO2 concentration (Ci). Tetraploid species had a lower light saturation point (LSP) and CO2 saturation point (CSP), higher light compensation point (LCP), dark respiration (Rd), and CO2 compensation point (CCP) than diploid species. Furthermore, tetraploid species have lower photosynthetic capacity than diploid species, including net photosynthetic rate (Pn), stomatal conductivity (Gs), and transpiration rate (Tr). In addition, haplotype had a significant effect on LSP, CSP, Tr, and Ci as well as a significant interactive effect between ploidy and haplotype on the maximal photosynethic rate of the light-response curve and Rd. Most of the variance existed within haplotypes among individuals. These results suggest that polyploidization was the main driver for the evolution of photosynthesis with increasing ploidy level (i.e. from diploidy to tetraploidy in Fragaria species), while the origin of a chromosome could also affect the photosynthetic traits and the polyploidization effect on photosynthetic traits.

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Morphological and Photosynthetic Response to High and Low Irradiance ofAeschynanthus longicaulis

Cited by 25 publications

References 35 publications

Leaf morphology, photosynthesis and pigments change with age and light regime in savin juniper

Leaf morphology, photosynthesis and pigments change with age and light regime in savin juniper

Low Light Alters the Photosynthesis Process in Cigar Tobacco via Modulation of the Chlorophyll Content, Chlorophyll Fluorescence, and Gene Expression

Effects of ploidy level and haplotype on variation of photosynthetic traits: Novel evidence from two Fragaria species

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