Tags

Type your tag names separated by a space and hit enter

Morphological changes during juvenile-to-adult phase transition in sorghum.
Planta 2019; 250(5):1557-1566P

Abstract

MAIN CONCLUSION

Morphological and genetic markers indicate that in sorghum, the juvenile-to-adult phase transition occurs during the fourth and fifth leaf stages. This timing differs from those reported for other plants. The juvenile-to-adult (JA) phase transition is an important event for optimizing vegetative growth and reproductive success in plants. Among the Poaceae crops, which are a vital food source for humans, studies of the JA phase transition have been restricted to rice and maize. We studied the morphological and genetic changes that occur during the early development of sorghum and found that dramatic changes occur in shoot architecture during the early vegetative stages. Changes were observed in leaf size, leaf shape, numbers of trichomes, and size of the shoot apical meristem. In particular, the length/width ratios of the leaf blades in the fifth and upper leaves were completely different from those of the second to fourth leaves. The fifth and upper leaves have trichomes on their adaxial sides, which were absent on the lower leaves. We also analyzed expression of two microRNAs that are known to be molecular markers of the JA phase transition and found that expression of miR156 was highest in the second to fourth leaves and then was gradually down-regulated, whereas miR172 expression followed the opposite pattern. These results suggest that in sorghum, the second and third leaves represent the juvenile phase, the fourth and fifth leaves are in the transition stage, and the sixth and upper leaves are in the adult phase. Thus, the JA phase transition occurs during the fourth and fifth leaf stages. These findings are expected to be useful for understanding the early development of sorghum.

Authors+Show Affiliations

Laboratory of Plant Breeding, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.Laboratory of Plant Breeding, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan. Education and Research Field, School of Life and Environmental Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.Laboratory of Plant Breeding, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan. shyokoi@plant.osakafu-u.ac.jp. Education and Research Field, School of Life and Environmental Sciences, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan. shyokoi@plant.osakafu-u.ac.jp.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31359138

Citation

Hashimoto, Shumpei, et al. "Morphological Changes During Juvenile-to-adult Phase Transition in Sorghum." Planta, vol. 250, no. 5, 2019, pp. 1557-1566.
Hashimoto S, Tezuka T, Yokoi S. Morphological changes during juvenile-to-adult phase transition in sorghum. Planta. 2019;250(5):1557-1566.
Hashimoto, S., Tezuka, T., & Yokoi, S. (2019). Morphological changes during juvenile-to-adult phase transition in sorghum. Planta, 250(5), pp. 1557-1566. doi:10.1007/s00425-019-03251-x.
Hashimoto S, Tezuka T, Yokoi S. Morphological Changes During Juvenile-to-adult Phase Transition in Sorghum. Planta. 2019;250(5):1557-1566. PubMed PMID: 31359138.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Morphological changes during juvenile-to-adult phase transition in sorghum. AU - Hashimoto,Shumpei, AU - Tezuka,Takahiro, AU - Yokoi,Shuji, Y1 - 2019/07/29/ PY - 2019/04/17/received PY - 2019/07/25/accepted PY - 2019/7/31/pubmed PY - 2019/7/31/medline PY - 2019/7/31/entrez KW - Gene expression analysis KW - Juvenile-to-adult phase transition KW - MicroRNA156/172 KW - Sorghum SP - 1557 EP - 1566 JF - Planta JO - Planta VL - 250 IS - 5 N2 - MAIN CONCLUSION: Morphological and genetic markers indicate that in sorghum, the juvenile-to-adult phase transition occurs during the fourth and fifth leaf stages. This timing differs from those reported for other plants. The juvenile-to-adult (JA) phase transition is an important event for optimizing vegetative growth and reproductive success in plants. Among the Poaceae crops, which are a vital food source for humans, studies of the JA phase transition have been restricted to rice and maize. We studied the morphological and genetic changes that occur during the early development of sorghum and found that dramatic changes occur in shoot architecture during the early vegetative stages. Changes were observed in leaf size, leaf shape, numbers of trichomes, and size of the shoot apical meristem. In particular, the length/width ratios of the leaf blades in the fifth and upper leaves were completely different from those of the second to fourth leaves. The fifth and upper leaves have trichomes on their adaxial sides, which were absent on the lower leaves. We also analyzed expression of two microRNAs that are known to be molecular markers of the JA phase transition and found that expression of miR156 was highest in the second to fourth leaves and then was gradually down-regulated, whereas miR172 expression followed the opposite pattern. These results suggest that in sorghum, the second and third leaves represent the juvenile phase, the fourth and fifth leaves are in the transition stage, and the sixth and upper leaves are in the adult phase. Thus, the JA phase transition occurs during the fourth and fifth leaf stages. These findings are expected to be useful for understanding the early development of sorghum. SN - 1432-2048 UR - https://www.unboundmedicine.com/medline/citation/31359138/Morphological_changes_during_juvenile-to-adult_phase_transition_in_sorghum L2 - https://dx.doi.org/10.1007/s00425-019-03251-x DB - PRIME DP - Unbound Medicine ER -