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Duarte, A. G.*; Katata, Genki; Hoshika, Yasutomo*; Hossain, M.*; Kreuzwieser, J.*; Arneth, A.*; Ruehr, N. K.*
Journal of Plant Physiology, 205, p.57 - 66, 2016/10
Times Cited Count：44 Percentile：83.72(Plant Sciences)The frequency and intensity of climatic extremes, such as heat waves, are predicted to increase globally, with severe implications for terrestrial carbon and water cycling. Temperatures may rise above critical thresholds that allow trees to function optimally, with unknown long-term consequences for forest ecosystems. In this context, we investigated how photosynthetic traits and the water balance in Douglasfir are affected by exposure to three heat waves. Photosynthetic carboxylation efficiency was mostly unaffected, but electron transport and photosynthetic rates under saturating light were strongly influenced by the heat waves, with lagging limitations on photosynthesis still being observed six weeks after the last heat wave. We also observed lingering heat-induced inhibitions on transpiration, minimum stomatal conductance, and nighttime stomatal conductance. Results from the stomatal models used to calculate minimum stomatal conductance were similar to gs-night and indicated changes in leaf morphology, such as stomatal occlusions and alterations in epicuticular wax. Our results show Douglas-fir's ability to restrict water loss following heat stress, but at the price of reduced photosynthetic performance. Such limitations indicate potential long-term restrictions that heat waves can impose on tree development and functioning under extreme climatic conditions.
L. var. 
Koehne)Biswas, K.; Mori, Takeshi*; Kogawara, Satoshi*; Hase, Yoshihiro; Narumi, Issei; Ono, Yutaka
American Journal of Plant Sciences, 3(9), p.1181 - 1186, 2012/09
-transferase gene in cyclamenKitamura, Satoshi; Akita, Yusuke; Ishizaka, Hiroshi*; Narumi, Issei; Tanaka, Atsushi
Journal of Plant Physiology, 169(6), p.636 - 642, 2012/04
Times Cited Count：85 Percentile：91.26(Plant Sciences)In order to identify the anthocyanin-related GST in cyclamen, four candidates of GSTs (CkmGST1 to CkmGST4) were isolated. Phylogenetic analysis indicated that CkmGST3 was closely related to PhAN9, an anthocyanin-related GST of petunia. Expression analysis at different developmental stages of petals revealed that CkmGST3 was strongly expressed in paler pigmented petals than in fully pigmented petals, in contrast to the constitutive expression of the other three candidates during petal development. This expression pattern of CkmGST3 was correlated with those of other anthocyaninbiosynthetic genes such as CkmF3'5'H and CkmDFR2. Molecular complementation of Arabidopsis 
, a knockout mutant of an anthocyanin-related GST gene, demonstrated that CkmGST3 could complement the anthocyanin-less phenotype of . Transgenic plants that expressed the other three CkmGSTs did not show anthocyanin accumulation. These results indicate CkmGST3 functions in anthocyanin accumulation in cyclamen.
Kitamura, Satoshi; Matsuda, Fumio*; Toge, Takayuki*; Sakakibara, Keiko*; Yamazaki, Mami*; Saito, Kazuki*; Narumi, Issei
Plant Journal, 62(4), p.549 - 559, 2010/05
Times Cited Count：89 Percentile：90.01(Plant Sciences)Arabidopsis TT19 encodes a GST-like protein that is involved in the accumulation of proanthocyanidins (PAs) in the seed coat. PA accumulation sites in tt19 immature seeds were observed as small vacuolar-like structures, which show unique thick morphology by differential interference contrast microscopy. The distribution pattern of the thick structures overlapped the location of PA accumulation sites in tt19. Metabolic profiling of the solvent-soluble fraction demonstrated that PA derivatives such as epicatechins and epicatechin oligomers, although highly accumulated in the wild-type, were absent in tt19. We also revealed that tt12 specifically accumulated glycosylated epicatechins, the putative transport substrates for TT12. Given the cytosolic localization of functional GFP-TT19 proteins, our results suggest that TT19, which acts prior to TT12, functions in cytosol for regular accumulation of PA precursors such as epicatechin and glycosylated epicatechin in the vacuole.
potentially mediates the response to synthetic auxin, 2,4-dichlorophenoxyacetic acid, in 
Nakasone, Akari; Yamada, Maki*; Kiyosue, Tomohiro*; Narumi, Issei; Uchimiya, Hirofumi*; Ono, Yutaka
Journal of Plant Physiology, 166(12), p.1307 - 1313, 2009/08
Times Cited Count：6 Percentile：17.94(Plant Sciences) is defective in the DNA damage responseSakamoto, Ayako; Lan, V. T. T.*; Puripunyavanich, V.*; Hase, Yoshihiro; Yokota, Yuichiro; Shikazono, Naoya; Nakagawa, Mayu*; Narumi, Issei; Tanaka, Atsushi
Plant Journal, 60(3), p.509 - 517, 2009/07
Times Cited Count：20 Percentile：48.74(Plant Sciences)no abstracts in English
Y-family DNA polymerase 
catalyses translesion synthesis and interacts functionally with PCNA2Anderson, H.*; Vonarx, E.*; Pastushok, L.*; Nakagawa, Mayu; Katafuchi, Atsushi*; Gruz, P.*; Rubbo, A.*; Grice, D.*; Osmond, M.*; Sakamoto, Ayako; et al.
Plant Journal, 55(6), p.895 - 908, 2008/09
Times Cited Count：43 Percentile：71.91(Plant Sciences)Suzuki, Motofumi*; Takahashi, Michiko*; Tsukamoto, Takashi*; Watanabe, Satoshi; Matsuhashi, Shimpei; Yazaki, Junshi*; Kishimoto, Naoki*; Kikuchi, Shoshi*; Nakanishi, Hiromi*; Mori, Satoshi*; et al.
Plant Journal, 48(1), p.85 - 97, 2006/10
Times Cited Count：176 Percentile：95.63(Plant Sciences)Rahman, A.*; Nakasone, Akari*; Chhun, T.*; Oura, Chiharu*; Biswas, K. K.*; Uchimiya, Hirofumi*; Tsurumi, Seiji*; Baskin, T. I.*; Tanaka, Atsushi; Ono, Yutaka
Plant Journal, 47(5), p.788 - 801, 2006/09
Times Cited Count：36 Percentile：61.43(Plant Sciences)2,4-D, a chemical analogue of IAA, is widely used as a growth regulator and exogenous source of auxin. It is believed that they share a common response pathway. Here, we show that a mutant, 
(
) is resistant to 2,4-D, yet nevertheless responds like the wild type to IAA. That the mutation alters 2,4-D responsiveness specifically was confirmed by analysis of GUS expression in the
and 
backgrounds, as well as by real-time PCR quantification of 
expression. Complementation and RNAi experiments identified a gene that confers 2,4-D responsiveness. The gene encodes a 
with unknown function and present in plants, animals, and invertebrates. These results suggest that SMAP1 is a regulatory component that mediates responses to 2,4-D and that responsiveness to 2,4-D and IAA are partially distinct.
gene promotes progression of endo-reduplication and confers increased tolerance towards ultraviolet B lightHase, Yoshihiro; Trung, K. H.*; Matsunaga, Tsukasa*; Tanaka, Atsushi
Plant Journal, 46(2), p.317 - 326, 2006/04
Times Cited Count：105 Percentile：89.45(Plant Sciences)We have isolated and characterized a new ultraviolet-B (UV-B)-resistant mutant, , of Arabidopsis. The fresh weight of plants grown under supplemental UV-B light was more than twice that of the wild type. No significant difference was found in the ability to repair the UV-B-induced cyclobutane pyrimidine dimers (CPDs), or in the amount of UV-B absorptive compounds, both of which are well known factors that contribute to UV sensitivity. Positional cloning revealed that the 
gene encodes a novel basic protein of unknown function. We found that the hypocotyl cells in undergo one extra round of endoreduplication. The mutation also promoted the progression of endoreduplication during leaf development. The gene is expressed mainly in actively dividing cells. In the leaves of P::GUS plants, the GUS signal disappeared in basipetal fashion as the leaf developed. The total leaf blade area was not different between and the wild type through leaf development, while the average cell area in the adaxial epidermis was considerably larger in , suggesting that the leaves have fewer but larger epidermal cells. These results suggest that the is necessary for the maintenance of the mitotic state and the loss of function stimulated endoreduplication. Tetraploid Arabidopsis was hyperresistant to UV-B compared to diploid Arabidopsis, suggesting that the enhanced polyploidization is responsible for the increased UV-B tolerance of the .
-phytosiderophore and as Fe
Ishimaru, Yasuhiro*; Suzuki, Motofumi*; Tsukamoto, Takashi*; Suzuki, Kazumasa*; Nakazono, Mikio*; Kobayashi, Takanori*; Wada, Yasuaki*; Watanabe, Satoshi; Matsuhashi, Shimpei; Takahashi, Michiko*; et al.
Plant Journal, 45(3), p.335 - 346, 2006/02
Times Cited Count：582 Percentile：99.63(Plant Sciences)
(
), a novel hypernodulation mutant of 
affected in vascular tissue organization and floral inductionKira, Erika*; Tateno, Kumiko*; Miura, Kinichiro*; Haga, Tatsuya*; Hayashi, Masaki*; Harada, Kyuya*; Sato, Shusei*; Tabata, Satoshi*; Shikazono, Naoya; Tanaka, Atsushi; et al.
Plant Journal, 44(3), p.505 - 515, 2005/11
Times Cited Count：93 Percentile：86.56(Plant Sciences)no abstracts in English
Hayashi, Hirotaka; Narumi, Issei; Wada, Seiichi; Kikuchi, Masahiro; Furuta, Masakazu*; Uehara, Kaku*; Watanabe, Hiroshi*
Journal of Plant Physiology, 161(10), p.1101 - 1106, 2004/10
Times Cited Count：11 Percentile：24.73(Plant Sciences)The resistance of strains Z (wild type) and SM-ZK (chloroplast-deficient mutant) to ionizing radiation was investigated. The colony forming ability of 
strain Z was higher than that of strain SM-ZK after 
-irradiation. For both strains, the resistance of light-grown cells was higher than that of dark-grown cells, suggesting that the light conditions during the culture contribute to the radiation resistance of . The comet assay showed that the ability of rejoining DNA double-strand breaks (dsb) was much higher in the light-grown cells. These results suggest that possesses a light-induced repair system to cope with DNA dsb.
is involved in the accumulation of both anthocyanins and proanthocyanidins in 
Kitamura, Satoshi; Shikazono, Naoya; Tanaka, Atsushi
Plant Journal, 37(1), p.104 - 114, 2004/01
Times Cited Count：408 Percentile：99.11(Plant Sciences)Flavonoid compounds such as anthocyanins and proanthocyanidins (PAs; so-called condensed tannins) must be transported from the site of synthesis in the cytosol to the vacuoles. Novel Arabidopsis mutants, transparent testa 19 (tt19), which were induced by ion beam irradiation, showed a great reduction of anthocyanin pigments in the vegetative parts as well as brown pigments in the seed coat. The TT19 gene was isolated by chromosome walking and the gene candidate approach, and was shown to be a member of the Arabidopsis glutathione S-transferase (GST) gene family. Heterologous expression of a putative ortholog, petunia AN9, in tt19 complemented the anthocyanin accumulation but not the brown pigmentation in the seed coat. This suggests that the TT19 gene is required for vacuolar uptake of anthocyanins into vacuoles, but that it has also a different function from AN9. The depositional pattern of PA precursors in the mutant was different from that in the wild type. These results indicate that TT19 participates in the PA pathway as well as the anthocyanin pathway of Arabidopsis.
Hase, Yoshihiro; Tanaka, Atsushi; Baba, Tomohiro*; Watanabe, Hiroshi
Plant Journal, 24(1), p.21 - 32, 2000/10
Times Cited Count：47 Percentile：70.67(Plant Sciences)no abstracts in English
