Comparative studies on the photosynthetic characteristics of two maize (Zea mays L.) near-isogenic lines differing in their susceptibility to low light intensity

Qian, Chuang-Jian; Zhang, Wei; Zhong, Xuemei; Shi, Zhensheng

doi:10.9755/ejfa.2016-07-839

Cited by 5 publications

(5 citation statements)

References 40 publications

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“…The Y values under the weak light condition were lower than in control groups (Table 5). This was in accordance with weak light stress reducing the chlorophyll fluorescence characteristics [2,3].…”

Section: Chlorophyll Fluorescence Parameters Of C Kawakamii Seedlingssupporting

confidence: 81%

“…Long-term light intensity is significantly lower than the light saturation points for plants. Thus, weak light stress is produced, which may affect plant growth [2,3]. These changes play an important role in plant adaptation to variations in light conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Weak light decreases the chlorophyll content in plants, which decreases leaf thickness, leaf mass per area (LMA), and chlorophyll content (SPAD value) of Daphniphyllum macropodum plants [5]. It also decreases the chlorophyll content of cucumber leaves [6] and two maize near-isogenic lines (NILs) [3]. However, some results reported that chlorophyll a (Chl-a)…”

Section: Introductionmentioning

confidence: 99%

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Response of Photosynthesis and Chlorophyll Fluorescence Parameters of Castanopsis kawakamii Seedlings to Forest Gaps

Tang

et al. 2019

Forests

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Light is a major environmental factor limiting the growth and survival of plants. The heterogeneity of the light environment after gap formation in forest influences the leaf chlorophyll contents, net photosynthetic rate (P n ), and chlorophyll fluorescence, thus influencing the growth and regeneration of Castanopsis kawakamii seedlings. The aim of this study was to explore the effects of weak light on the photosynthetic physiology of C. kawakamii seedlings in forest gaps and non-gaps. The results showed that (1) the contents of chlorophyll a (Chl-a), chlorophyll b (Chl-b), and total chlorophyll (Chl-T) in forest gaps were lower than in non-gaps. Seedlings tended to increase chlorophyll content to absorb light energy to adapt to low light intensity in non-gap environments.(2) The P n values of C. kawakamii seedlings in forest gaps were significantly higher than in non-gaps, and forest gaps could improve the seedlings' photosynthetic capacity. (3) The C. kawakamii seedlings in forest gaps were more sensitive to weak light and control group treatment, especially the tall seedlings, indicating that seedlings require more light to satisfy their growth needs in the winter. The seedlings in non-gaps demonstrated better adaptability to low light intensity. The light intensity was not adequate in weak light conditions and limited seedling growth. We suggest that partial forest selection cutting could improve light intensity in non-gaps, thus promoting seedling growth and regeneration of C. kawakamii more effectively in this forest.

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Section: Chlorophyll Fluorescence Parameters Of C Kawakamii Seedlingssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of Photosynthesis and Chlorophyll Fluorescence Parameters of Castanopsis kawakamii Seedlings to Forest Gaps

Tang

et al. 2019

Forests

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“…The photoreaction requires coordination of the photosynthetic system in order to complete the normal linear electron transfer and provide the homogeneity for the fixation and reduction of CO 2 in the dark reaction. ( Qian et al., 2017 ). In the present study, Pn, qP, and Φ PSII continued to decrease during shading in SN98A, whereas they tended to increase initially and then decrease in SN98B, but the values were always higher than those in SN98A, thereby indicating that the normal photosynthetic physiological process was maintained in SN98B.…”

Section: Discussionmentioning

confidence: 99%

Effect of gibberellic acid on photosynthesis and oxidative stress response in maize under weak light conditions

Li²,

Wang³

et al. 2023

Front. Plant Sci.

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Gibberellin (GA) is an important endogenous hormone involved in plant responses to abiotic stresses. Experiments were conducted at the Research and Education Center of Agronomy, Shenyang Agricultural University (Shenyang, China) in 2021.We used a pair of near-isogenic inbred maize lines comprising, SN98A (light-sensitive inbred line) and SN98B (light-insensitive inbred line) to study the effects of exogenous gibberellin A3 (GA3) application on different light-sensitive inbred lines under weak light conditions. The concentration of GA3 was selected as 20, 40 and 60 mg L-1. After shade treatment, the photosynthetic physiological indexes of SN98A were always lower than SN98B, and the net photosynthetic rate of SN98A was 10.12% lower than SN98B on the 20th day after shade treatment. GA3 treatments significantly reduced the barren stalk ratios in SN98A and improved its seed setting rates by increasing the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), photosynthetic pigment contents, photochemical efficiency of photosystem II (PS II) (Fv/Fm), photochemical quenching coefficient (qP), effective quantum yield of PSII photochemistry (ΦPSII), and antioxidant enzyme activities, where the most effective treatment was 60 mg L–1GA3. Compared with CK group, the seed setting rate increased by 33.87%. GA3 treatment also regulated the metabolism of reactive oxygen species (ROS) and reduced the superoxide anion (O2-) production rate, H2O2 content, and malondialdehyde content. The superoxide anion (O2-) production rate, H2O2 content and malondialdehyde content of SN98A sprayed with 60 mg L-1 GA3 decreased by 17.32%,10.44% and 50.33% compared with CK group, respectively. Compared with the control, GA3 treatment significantly (P < 0.05) increased the expression levels of APX and GR in SN98A, and APX, Fe-SOD, and GR in SN98B. Weak light stress decreased the expression of GA20ox2, which was related to gibberellin synthesis, and the endogenous gibberellin synthesis of SN98A. Weak light stress accelerated leaf senescence, and exogenous GA3 application inhibited the ROS levels in the leaves and maintained normal physiological functions in the leaves. These results indicate that exogenous GA3 enhances the adaptability of plants to low light stress by regulating photosynthesis, ROS metabolism and protection mechanisms, as well as the expression of key genes, which may be an economical and environmentally friendly method to solve the low light stress problem in maize production.

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“…Researchers have studied the effects of solar radiation on maize growth and development through shading experiments in order to alleviate the negative effects of solar radiation [13][14][15]. Overall, when solar radiation was decreased, the photosynthetic production capacity likewise decreased, and the accumulation of assimilates was insufficient [16,17]. At the same time, insufficient solar radiation leads to limited ear development, an unbalanced growth of female and male ears, a shortened grain filling period, and a final yield decline [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effects of Solar Radiation on Dry Matter Distribution and Root Morphology of High Yielding Maize Cultivars

et al. 2022

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The root system connects the plant with the soil, which is a key factor in determining the utilization of soil resources and plant growth potential. Solar radiation can change maize shoot and root growth and affect grain formation. In this study, the effects of different solar radiation conditions on root morphology of three maize cultivars XY335, ZD958 and DH618 and their quantitative relationships were studied by conducting shading experiments. This study was conducted in maize high yield region of Qitai and Yinchuan, China, in 2018 and 2019. The planting densities were 7.5 × 104 (D1) and 12 × 104 (D2) plants ha−1. The shading levels were natural light (CK), shading 15% (S1), 30% (S2) and 50% (S3). The results showed that maize responded to the decreased solar radiation through the increase in ratio of shoot dry weight (SWR) to whole plant dry weight and the decrease in ratio of root dry weight (RWR) to whole plant dry weight. As the solar radiation decreased, the root length density (RLD), root surface area (RSA), average root diameter (ARD) and root length ratio (RLR) decreased, while the specific root length (SRL) increased. With 100 MJ m−2 decrease in solar radiation, the RWR, RLD, RSA and RLR each decreased by 1.47%, 0.5 mm cm−3,0.4 m m−2 and 0. 19 m g−1, respectively. Among the cultivars, the changes of DH618 were the fastest followed by XY335 and ZD958 but DH618 maintained the largest root system under any solar radiation condition. After the decrease of solar radiation, RWR, RLD and RLR were significantly positively correlated with the yield. This indicated that large root systems were conducive to the rapid response to decreased solar radiation and important for achieving stable and high yield. Maize cultivars with these type of root systems should be recommended to better adapt low solar radiation induced by regional variation or climate change.

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Comparative studies on the photosynthetic characteristics of two maize (Zea mays L.) near-isogenic lines differing in their susceptibility to low light intensity

Cited by 5 publications

References 40 publications

Response of Photosynthesis and Chlorophyll Fluorescence Parameters of Castanopsis kawakamii Seedlings to Forest Gaps

Response of Photosynthesis and Chlorophyll Fluorescence Parameters of Castanopsis kawakamii Seedlings to Forest Gaps

Effect of gibberellic acid on photosynthesis and oxidative stress response in maize under weak light conditions

Effects of Solar Radiation on Dry Matter Distribution and Root Morphology of High Yielding Maize Cultivars

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