Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses
Increasing the planting density is an effective way to increase the yield of maize (Zeamays L.), although it can also aggravate ovary apical abortion-induced bald tips of the ears, which might, in turn, reduce the yield. While the mechanism underlying the regulation of drought-related abortion in ma...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-01-01
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| Series: | Journal of Integrative Agriculture |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095311922001617 |
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| author | Min ZHANG Li-juan XING Xiao-tian REN Jun-jie ZOU Fu-peng SONG Lei WANG Miao-yun XU |
| author_facet | Min ZHANG Li-juan XING Xiao-tian REN Jun-jie ZOU Fu-peng SONG Lei WANG Miao-yun XU |
| author_sort | Min ZHANG |
| collection | DOAJ |
| description | Increasing the planting density is an effective way to increase the yield of maize (Zeamays L.), although it can also aggravate ovary apical abortion-induced bald tips of the ears, which might, in turn, reduce the yield. While the mechanism underlying the regulation of drought-related abortion in maize is well established, high planting density-related abortion in maize remains poorly understood.Therefore, the present study was designed to investigate the mechanism underlying the ovary apical abortion response to high density. This was achieved by evaluating the effects of four different plant densities (60000 plantsha−1 (60 k), 90 k, 120 k, and 150 k) on plant traits related to plant architecture, the plant ear, flowering time, and silk development in two inbred lines (Zheng58 and PH4CV) and two hybrid lines (Zhengdan958 and Xianyu335).The phenotypes of both inbred and hybrid plants were observed under different planting density treatments, and the high planting density was found to increase the phenotypic performance values of the evaluated traits. The anthesis–silking interval (ASI) was extended, and the amount of the silk extruded from husks was reduced upon increasing the planting density. Delayed silk emergence resulted in asynchronous flowering and ear bald tips. Observations of the silk cells revealed that the silk cells became smaller as planting density increased.The changes in transcript abundances in the silks involved the genes associated with expansive growth rather than carbon metabolism. These findings further our understanding of silk growth regulation under high planting density and provide a theoretical basis for further research on improving high planting density breeding in maize. |
| first_indexed | 2024-04-11T08:22:19Z |
| format | Article |
| id | doaj.art-5508733f31134831a389691cfcda673a |
| institution | Directory Open Access Journal |
| issn | 2095-3119 |
| language | English |
| last_indexed | 2024-04-11T08:22:19Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Integrative Agriculture |
| spelling | doaj.art-5508733f31134831a389691cfcda673a2022-12-22T04:34:52ZengElsevierJournal of Integrative Agriculture2095-31192022-01-01211131483157Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analysesMin ZHANG0Li-juan XING1Xiao-tian REN2Jun-jie ZOU3Fu-peng SONG4Lei WANG5Miao-yun XU6Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaBiotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaCollege of Bioscience and Resources of Environment, Beijing University of Agriculture, Beijing 102206, P.R. ChinaBiotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. ChinaNational Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resource, College of Resources and Environment, Shandong Agricultural University, Tai'an271018, P.R. ChinaBiotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China; Correspondence WANG LeiBiotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China; Correspondence XU Miao-yunIncreasing the planting density is an effective way to increase the yield of maize (Zeamays L.), although it can also aggravate ovary apical abortion-induced bald tips of the ears, which might, in turn, reduce the yield. While the mechanism underlying the regulation of drought-related abortion in maize is well established, high planting density-related abortion in maize remains poorly understood.Therefore, the present study was designed to investigate the mechanism underlying the ovary apical abortion response to high density. This was achieved by evaluating the effects of four different plant densities (60000 plantsha−1 (60 k), 90 k, 120 k, and 150 k) on plant traits related to plant architecture, the plant ear, flowering time, and silk development in two inbred lines (Zheng58 and PH4CV) and two hybrid lines (Zhengdan958 and Xianyu335).The phenotypes of both inbred and hybrid plants were observed under different planting density treatments, and the high planting density was found to increase the phenotypic performance values of the evaluated traits. The anthesis–silking interval (ASI) was extended, and the amount of the silk extruded from husks was reduced upon increasing the planting density. Delayed silk emergence resulted in asynchronous flowering and ear bald tips. Observations of the silk cells revealed that the silk cells became smaller as planting density increased.The changes in transcript abundances in the silks involved the genes associated with expansive growth rather than carbon metabolism. These findings further our understanding of silk growth regulation under high planting density and provide a theoretical basis for further research on improving high planting density breeding in maize.http://www.sciencedirect.com/science/article/pii/S2095311922001617maize (Zea mays L.)high planting densitybald tipASIsilk expansive growth |
| spellingShingle | Min ZHANG Li-juan XING Xiao-tian REN Jun-jie ZOU Fu-peng SONG Lei WANG Miao-yun XU Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses Journal of Integrative Agriculture maize (Zea mays L.) high planting density bald tip ASI silk expansive growth |
| title | Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses |
| title_full | Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses |
| title_fullStr | Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses |
| title_full_unstemmed | Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses |
| title_short | Evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses |
| title_sort | evidence of arrested silk growth in maize at high planting density using phenotypic and transcriptional analyses |
| topic | maize (Zea mays L.) high planting density bald tip ASI silk expansive growth |
| url | http://www.sciencedirect.com/science/article/pii/S2095311922001617 |
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