1
|
Chen G, Liu M, Zhao X, Bawa G, Liang B, Feng L, Pu T, Yong T, Liu W, Liu J, Du J, Yang F, Wu Y, Liu C, Wang X, Yang W. Improved photosynthetic performance under unilateral weak light conditions in a wide-narrow-row intercropping system is associated with altered sugar transport. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:258-273. [PMID: 37721809 DOI: 10.1093/jxb/erad370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 09/15/2023] [Indexed: 09/20/2023]
Abstract
Intercropping improves resource utilization. Under wide-narrow-row maize (Zea mays) intercropping, maize plants are subjected to weak unilateral illumination and exhibit high photosynthetic performance. However, the mechanism regulating photosynthesis under unilateral weak light remains unknown. We investigated the relationship between photosynthesis and sugar metabolism in maize under unilateral weak light. Our results showed that the net photosynthetic rate (Pn) of unshaded leaves increased as the level of shade on the other side increased. On the contrary, the concentration of sucrose and starch and the number of starch granules in the unshaded leaves decreased with increased shading due to the transfer of abundant C into the grains. However, sink loss with ear removal reduced the Pn of unshaded leaves. Intense unilateral shade (40% to 20% normal light), but not mild unilateral shade (60% normal light), reduced grain yield (37.6% to 54.4%, respectively). We further found that in unshaded leaves, Agpsl, Bmy, and Mexl-like expression significantly influenced sucrose and starch metabolism, while Sweet13a and Sut1 expression was crucial for sugar export. In shaded leaves, expression of Sps1, Agpsl, and Sweet13c was crucial for sugar metabolism and export. This study confirmed that unshaded leaves transported photosynthates to the ear, leading to a decrease in sugar concentration. The improvement of photosynthetic performance was associated with altered sugar transport. We propose a narrow-row spacing of 40 cm, which provides appropriate unilateral shade and limits yield reduction.
Collapse
Affiliation(s)
- Guopeng Chen
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Ming Liu
- Guangxi Subtropical Crops Research Institute, Nanning 530001, P.R. China
| | - Xuyang Zhao
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - George Bawa
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Bing Liang
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Liang Feng
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Tian Pu
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Taiwen Yong
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Weiguo Liu
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Jiang Liu
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Junbo Du
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Feng Yang
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Yushan Wu
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Chunyan Liu
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Xiaochun Wang
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| | - Wenyu Yang
- College of Agronomy, Sichuan Agricultural University, 211-Huimin Road, Wenjiang District, Chengdu 611130, P.R. China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu, P. R. China
| |
Collapse
|
2
|
Sun X, Zhang EZ, Yu L, Du JB, Yang WY. Nitrogen allocation for CO 2 fixation promotes nitrogen use in the photosynthetic compensation of soybean under heterogeneous light after a pre-shading. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2023; 29:1755-1762. [PMID: 38162920 PMCID: PMC10754808 DOI: 10.1007/s12298-023-01392-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 11/14/2023] [Accepted: 11/16/2023] [Indexed: 01/03/2024]
Abstract
The spatial and temporal distribution of sunlight around plants is constantly changing in natural and farmland environments. Previous studies showed that the photosynthesis of crops responds significantly to heterogeneous light conditions in fields. However, the underlying mechanisms remain unclear. In the present study, soybean plants were treated by heterogeneous light after a pre-shading (SH-HL) to simulate the light condition in relay strip intercropping. Gas exchange and nitrogen (N) of leaves were measured to evaluate the photosynthetic performance, as well as photosynthetic N- and water-use efficiency (PNUE and PWUE). Chlorophylls (Chl) and Rubisco were analyzed as representative photosynthetic N components. Results suggest that SH-HL treated soybean exhibited evident photosynthetic compensation as the net photosynthetic rate (Pn) increased significantly in unshaded leaves, from which the export of photosynthates was enhanced. Under SH-HL, leaf N concentration remained relatively stable in unshaded leaves. While Chl concentration decreased but Rubisco concentration increased in unshaded leaves, indicating preferential allocation of leaf N for CO2 fixation. Results also showed that PNUE increased and PWUE decreased in unshaded leaves under SH-HL. Therefore, we suggest that within-leaf N allocation for CO2 fixation in unshaded leaves rather than within-plant N distribution to unshaded leaves drives the photosynthetic compensation under heterogeneous light after a pre-shading. However, enhanced water loss from unshaded leaves is a cost for efficient N-use under these conditions. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-023-01392-8.
Collapse
Affiliation(s)
- Xin Sun
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130 China
| | - En-Ze Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130 China
| | - Liang Yu
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130 China
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, 611130 China
| | - Jun-Bo Du
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130 China
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, 611130 China
| | - Wen-Yu Yang
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, 611130 China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, 611130 China
| |
Collapse
|
3
|
Huang SR, Ai Y, Du JB, Yu L, Wang XC, Yang WY, Sun X. Photosynthetic compensation of maize in heterogeneous light is impaired by restricted photosynthate export. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 192:50-56. [PMID: 36206706 DOI: 10.1016/j.plaphy.2022.09.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 09/07/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
When a plant is exposed to heterogeneous light, the photosynthesis of unshaded leaves is often stimulated to compensate for the decline in photosynthesis of shaded leaves, i.e., photosynthetic compensation. However, a decline of photosynthesis in unshaded leaves, which means an impairment of photosynthetic compensation, has also been widely reported. Herein, two cultivars of maize (Zea mays L.), 'Rongyu1210' (RY) and 'Zhongdan808' (ZD), were studied comparatively. Both cultivars performed evident photosynthetic compensation under heterogeneous light (HL) as the light phase begins (8:30 a.m.). However, as the light phase continues (10:30 a.m.), an impairment of photosynthetic compensation took place in HL-treated ZD, but not in HL-treated RY. For both cultivars, nitrogen content of unshaded leaves was higher under HL, indicating a preferential nitrogen distribution towards unshaded leaves. This is related to the photosynthetic compensation but not the cause of the impairment. In addition, no obvious difference was found in the response of photosynthates (sucrose and starch) to HL between cultivars at 8:30 a.m. However, at 10:30 a.m., the content of photosynthates decreased significantly in unshaded leaves of HL-treated RY, along with increased abundances of both sucrose transporters (SUTs) and H+-ATPase (EC 7.1.2.1). In contrast, it increased along with decreased abundances of SUTs and H+-ATPase in HL-treated ZD. These results suggest that the photosynthetic compensation is impaired when photosynthates export of unshaded leaves is restricted. This suggestion is further confirmed by the results of 13C labeling and dry weight detection on young leaves as 'sink'.
Collapse
Affiliation(s)
- Si-Rong Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yuan Ai
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jun-Bo Du
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, 611130, China
| | - Liang Yu
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, 611130, China
| | - Xiao-Chun Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, 611130, China
| | - Wen-Yu Yang
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, 611130, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, 611130, China.
| | - Xin Sun
- College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China.
| |
Collapse
|
4
|
Sun X, Huang SR, Du JB, Wang XC, Yang WY. Potential importance of malate diffusion in the response of maize photosynthesis to heterogeneous light. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 162:69-73. [PMID: 33667968 DOI: 10.1016/j.plaphy.2021.02.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
It is well known that the photosynthetic performance of a leaf is highly dependent on the systemic regulation from distal parts within a plant under light heterogeneity. However, there are few studies focusing on C4-specific processes. In the present study, two cultivars of maize (Zea mays L.), 'Rongyu 1210' (RY) and 'Zhongdan 808' (ZD), were treated with heterogeneous light (HL). The net photosynthetic rate (Pn) of newly developed leaves was found to increase in HL-treated RY, while it decreased in HL-treated ZD. Result also showed a negative correlation between the Pn and the content of malate, a key metabolite in C4 photosynthesis, in these two cultivars. In HL-treated ZD, malate content increased with a decline in the abundance of NADP-malic enzyme (EC 1.1.1.40), suggesting that less malate was decarboxylated. Moreover, a restriction of malate diffusion is proposed in HL-treated ZD, since the interface length between mesophyll cells (MC) and bundle sheath cells (BSC) decreased. In contrast, malate diffusion and subsequent decarboxylation in HL-treated RY should be stimulated, due to an increase in the abundance of NADP-malate dehydrogenase (EC 1.1.1.82) and a decline in the content of malate. In this case, malate diffusion from MC to BSC should be systemically stimulated, thereby facilitating C4 photosynthesis of a maize leaf in heterogeneous light. While if it is systemically restricted, C4 photosynthesis would be suppressed.
Collapse
Affiliation(s)
- Xin Sun
- College of Agronomy, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China.
| | - Si-Rong Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Jun-Bo Du
- College of Agronomy, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China
| | - Xiao-Chun Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China; Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, China
| | - Wen-Yu Yang
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, China
| |
Collapse
|
5
|
Sun X, Huang SR, Ai Y, Zhang EZ, Wang XC, Du JB, Yang WY. Comparative study on the different responses of maize photosynthesis to systemic regulation under light heterogeneity. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 301:110666. [PMID: 33218633 DOI: 10.1016/j.plantsci.2020.110666] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 08/11/2020] [Accepted: 09/05/2020] [Indexed: 06/11/2023]
Abstract
Photosynthetic performance of a leaf is widely recognized to be systemically regulated by distal parts within the same plant. However, the effects of systemic regulation on different plant materials cannot be generalized. In this work, two cultivars of maize (Zea mays L.), 'Rongyu 1210' (RY) and 'Zhongdan 808' (ZD), were selected for a comparative study on the different responses of photosynthesis to light-dependent systemic regulation. After the growth of plants in heterogeneous light, the net photosynthetic rate of newly developed leaves increased in RY but decreased in ZD. A distinct capacity of CO2 fixation and assimilation between these two cultivars is also suggested. In ZD, the area of vascular bundles declined obviously, suggesting a restriction on carbohydrate export, which is also indicated by an increase in starch content. Resulting excessive accumulation of carbohydrates is proposed to inhibit the carbon assimilation, and eventually the photosynthesis. A decline in the area of bundle sheath cells also suggests a restriction on carbon assimilation. In contrast, these restrictions were unlikely to present in RY. This study reveals that the response of leaf photosynthetic performance to light heterogeneity is largely dependent on the systemic regulation of carbon assimilation, as well as carbohydrate export in maize.
Collapse
Affiliation(s)
- Xin Sun
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Crop Eco-physiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China.
| | - Si-Rong Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Yuan Ai
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - En-Ze Zhang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiao-Chun Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu 611130, China
| | - Jun-Bo Du
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory of Crop Eco-physiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China.
| | - Wen-Yu Yang
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu 611130, China
| |
Collapse
|
6
|
Chen G, Chen H, Shi K, Raza MA, Bawa G, Sun X, Pu T, Yong T, Liu W, Liu J, Du J, Yang F, Yang W, Wang X. Heterogeneous Light Conditions Reduce the Assimilate Translocation Towards Maize Ears. PLANTS 2020; 9:plants9080987. [PMID: 32759776 PMCID: PMC7465644 DOI: 10.3390/plants9080987] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 07/27/2020] [Accepted: 07/29/2020] [Indexed: 11/16/2022]
Abstract
The border row crop in strip intercropped maize is often exposed to heterogeneous light conditions, resulting in increased photosynthesis and yield decreased. Previous studies have focused on photosynthetic productivity, whereas carbon allocation could also be one of the major causes of decreased yield. However, carbon distribution remains unclear in partially shaded conditions. In the present study, we applied heterogeneous light conditions (T), and one side of plants was shaded (T-30%), keeping the other side fully exposed to light (T-100%), as compared to control plants that were exposed entirely to full-light (CK). Dry weight, carbon assimilation, 13C abundance, and transport tissue structure were analyzed to clarify the carbon distribution in partial shading of plants. T caused a marked decline in dry weight and harvest index (HI), whereas dry weight in unshaded and shaded leaves did not differ. Net photosynthesis rate (Pn), the activity of sucrose phosphate synthase enzymes (SPS), and sucrose concentration increased in unshaded leaves. Appropriately, 5.7% of the 13C from unshaded leaves was transferred to shaded leaves. Furthermore, plasmodesma density in the unshaded (T-100%) and shaded (T-30%) leaves in T was not significantly different but was lower than that of CK. Similarly, the vascular bundle total area of T was decreased. 13C transfer from unshaded leaves to ear in T was decreased by 18.0% compared with that in CK. Moreover, 13C and sucrose concentration of stem in T were higher than those in CK. Our results suggested that, under heterogeneous light, shaded leaves as a sink imported the carbohydrates from the unshaded leaves. Ear and shaded leaf competed for carbohydrates, and were not conducive to tissue structure of sucrose transport, resulting in a decrease in the carbon proportion in the ear, harvest index, and ear weight.
Collapse
Affiliation(s)
- Guopeng Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Hong Chen
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Kai Shi
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Muhammad Ali Raza
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - George Bawa
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Xin Sun
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Tian Pu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Taiwen Yong
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Weiguo Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Jiang Liu
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Junbo Du
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Feng Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Wenyu Yang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
| | - Xiaochun Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China; (G.C.); (H.C.); (K.S.); (M.A.R.); (G.B.); (X.S.); (T.P.); (T.Y.); (W.L.); (J.L.); (J.D.); (F.Y.); (W.Y.)
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Key Laboratory of Crop Ecophysiology and Farming System in Southwest China (Ministry of Agriculture), Chengdu 611130, China
- Correspondence: ; Tel.: +86-028-8629-0906
| |
Collapse
|
7
|
Huang SR, Du JB, Wang XC, Sun X, Yang WY. Involvement of carbohydrates in long-term light-dependent systemic regulation on photosynthesis of maize under light heterogeneity. PLANT SIGNALING & BEHAVIOR 2019; 14:1629266. [PMID: 31184293 PMCID: PMC6619968 DOI: 10.1080/15592324.2019.1629266] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/31/2019] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
It is widely recognized that different parts of a plant can communicate with each other via light-dependent long-distance signaling under heterogeneous light conditions. However, the mechanism of such systemic signaling has not been revealed yet. Our studies on different species suggest the involvement of carbohydrates in light-dependent systemic regulation between different parts of a plant under both short- and long-term light heterogeneity. Leaves exposed to better light condition perform enhanced photosynthetic capacity, and act to compensate for the decline in photosynthesis of other leaves under bad light condition within the same plant. This kind of compensatory photosynthesis has a close relationship to the distribution of carbohydrates, and can be regarded as an integrative strategy to make efficient use of sunlight at the whole-plant level.
Collapse
Affiliation(s)
- Si-Rong Huang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
| | - Jun-Bo Du
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China
| | - Xiao-Chun Wang
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, China
| | - Xin Sun
- College of Agronomy, Sichuan Agricultural University, Chengdu, China
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China
| | - Wen-Yu Yang
- Key Laboratory of Crop Eco-physiology and Farming System in Southwest China, Ministry of Agriculture, Chengdu, China
- Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, China
| |
Collapse
|