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Thanomchit K, Imsabai W, Burns P, McAtee PA, Schaffer RJ, Allan AC, Ketsa S. Differential expression of ethylene biosynthetic and receptor genes in pollination-induced senescence of Dendrobium flowers. Plant Physiol Biochem 2022; 188:38-46. [PMID: 35981438 DOI: 10.1016/j.plaphy.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Following successful pollination, Dendrobium orchid flowers rapidly undergo senescence. In Dendrobium cv. Khao Chaimongkol, compatible pollination resulted in faster ethylene production and more rapid development of senescence symptoms, such as drooping, epinasty, venation and yellowing, compared with non-pollinated controls or pollination with incompatible pollinia. The DenACS1 and DenACO1 genes in the perianth of florets that had been pollinated with compatible pollinia were expressed more highly than those in non-pollinated open florets. Incompatible pollinia reduced the expression of DenACS1 and DenACO1 genes in the perianth. Transcript levels of the ethylene receptor gene DenERS1 and signaling genes DenEIL1 and DenERF1 showed differential spatial regulation with greater expression in the perianth than in the column plus ovary following compatible pollination. Compatible pollinia increased ethylene production concomitant with premature senescence and the increased expression of the DenACS1 and DenACO1 genes, and suppressed the ethylene receptor gene DenERS1, whereas incompatible pollinia did not stimulate ethylene production nor induce premature senescence but induced higher expression of DenERS1 both in the perianth and in the column plus ovary. These results suggest that the increased ethylene production in open florets pollinated with compatible pollen was partially due to an increase in the expression of DenACS1 and DenACO1 genes. The compatible pollinia induced a negative regulation of DenERS1 which may play an important role in ethylene perception and in modulating ethylene signaling transduction during pollinia-induced flower senescence.
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Affiliation(s)
- Kanokwan Thanomchit
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand
| | - Wachiraya Imsabai
- Department of Horticulture, Faculty of Agriculture at Kamphaeng Saen Campus, Kasetsart University, Nakhon Pathom, 73140, Thailand
| | - Parichart Burns
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, PathumThani, 12120, Thailand
| | - Peter A McAtee
- Plant and Food Research Institute, Mt Albert Research Center, Private Bag 92019, Auckland, 1142, New Zealand
| | - Robert J Schaffer
- Plant and Food Research Institute, Mt Albert Research Center, Private Bag 92019, Auckland, 1142, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Andrew C Allan
- Plant and Food Research Institute, Mt Albert Research Center, Private Bag 92019, Auckland, 1142, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Saichol Ketsa
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand; Academy of Science, The Royal Society of Thailand, Dusit, Bangkok, 10300, Thailand.
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Santosa E, Lian CL, Sugiyama N, Misra RS, Boonkorkaew P, Thanomchit K. Population structure of elephant foot yams (Amorphophallus paeoniifolius (Dennst.) Nicolson) in Asia. PLoS One 2017; 12:e0180000. [PMID: 28658282 PMCID: PMC5489206 DOI: 10.1371/journal.pone.0180000] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 06/07/2017] [Indexed: 12/16/2022] Open
Abstract
The corms and leaves of elephant foot yams (Amorphophallus paeoniifolius (Dennst.) Nicolson) are important foods in the local diet in many Asian regions. The crop has high productivity and wide agroecological adaptation and exhibits suitability for the agroforestry system. Although the plant is assumed to reproduce via panmixia, a comprehensive study on the genetic background across regions to enhance wider consumer palatability is still lacking. Here, ten informative microsatellites were analyzed in 29 populations across regions in India, Indonesia and Thailand to understand the genetic diversity, population structure and distribution to improve breeding and conservation programs. The genetic diversity was high among and within regions. Some populations exhibited excess heterozygosity and bottlenecking. Pairwise FST indicated very high genetic differentiation across regions (FST = 0.274), and the Asian population was unlikely to be panmictic. Phylogenetic tree construction grouped the populations according to country of origin with the exception of the Medan population from Indonesia. The current gene flow was apparent within the regions but was restricted among the regions. The present study revealed that Indonesia and Thailand populations could be alternative centers of the gene pool, together with India. Consequently, regional action should be incorporated in genetic conservation and breeding efforts to develop new varieties with global acceptance.
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Affiliation(s)
- Edi Santosa
- Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University, Bogor, West Java, Indonesia
| | - Chun Lan Lian
- Asian Natural Environmental Science Center, The University of Tokyo, Nishitokyo-shi, Tokyo, Japan
| | - Nobuo Sugiyama
- Department of Horticulture, Faculty of Agriculture, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Raj Shekhar Misra
- Central Tuber Crops Research Institute, Sreekariyam, Thiruvananthapuram, Kerala, India
| | | | - Kanokwan Thanomchit
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
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