Plant & Cell Physiology最新文献_第10页

Erratum To: Trichomes at the Base of the Petal are Regulated by the Same Transcription Factors as Cotton Seed Fibers. 花瓣基部的毛状体与棉籽纤维受相同的转录因子调控。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcab138

Jiafu Tan, Sally-Anne Walford, Elizabeth S Dennis, Danny J Llewellyn

引用次数: 0

Silicon Reduces Aluminum-Induced Suberization by Inhibiting the Uptake and Transport of Aluminum in Rice Roots and Consequently Promotes Root Growth. 硅通过抑制铝在水稻根系中的吸收和运输来减少铝诱导的Suberization，从而促进根系生长。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcac001

Zhuoxi Xiao, Mujun Ye, Zixiang Gao, Yishun Jiang, Xinyuan Zhang, Nina Nikolic, Yongchao Liang

{"title":"Silicon Reduces Aluminum-Induced Suberization by Inhibiting the Uptake and Transport of Aluminum in Rice Roots and Consequently Promotes Root Growth.","authors":"Zhuoxi Xiao, Mujun Ye, Zixiang Gao, Yishun Jiang, Xinyuan Zhang, Nina Nikolic, Yongchao Liang","doi":"10.1093/pcp/pcac001","DOIUrl":"https://doi.org/10.1093/pcp/pcac001","url":null,"abstract":"Silicon (Si) can alleviate aluminum (Al) toxicity in rice (Oryza sativa L.), but the mechanisms underlying this beneficial effect have not been elucidated, especially under long-term Al stress. Here, the effects of Al and Si on the suberization and development of rice roots were investigated. The results show that, as the Al exposure time increased, the roots accumulated more Al, and Al enhanced the deposition of suberin in roots, both of which ultimately inhibited root growth and nutrient absorption. However, Si restricted the apoplastic and symplastic pathways of Al in roots by inhibiting the uptake and transport of Al, thereby reducing the accumulation of Al in roots. Meanwhile, the Si-induced drop in Al concentration reduced the suberization of roots caused by Al through down-regulating the expression of genes related to suberin synthesis and then promoted the development of roots (such as longer and more adventitious roots and lateral roots). Moreover, Si also increased nutrient uptake by Al-stressed roots and thence promoted the growth of rice. Overall, these results indicate that Si reduced Al-induced suberization of roots by inhibiting the uptake and transport of Al in roots, thereby amending root growth and ultimately alleviating Al stress in rice. Our study further clarified the toxicity mechanism of Al in rice and the role of Si in reducing Al content and restoring root development under Al stress.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"340-352"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39896428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Mitochondrial Fission Complex Is Required for Long-Term Heat Tolerance of Arabidopsis. 拟南芥长期耐热性需要线粒体裂变复合体。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcab171

Ryo Tsukimoto, Kazuho Isono, Takuma Kajino, Satoshi Iuchi, Akihisa Shinozawa, Izumi Yotsui, Yoichi Sakata, Teruaki Taji

{"title":"Mitochondrial Fission Complex Is Required for Long-Term Heat Tolerance of Arabidopsis.","authors":"Ryo Tsukimoto, Kazuho Isono, Takuma Kajino, Satoshi Iuchi, Akihisa Shinozawa, Izumi Yotsui, Yoichi Sakata, Teruaki Taji","doi":"10.1093/pcp/pcab171","DOIUrl":"https://doi.org/10.1093/pcp/pcab171","url":null,"abstract":"Plants are often exposed not only to short-term (S) heat stress but also to long-term (L) heat stress over several consecutive days. A few Arabidopsis mutants defective in L-heat tolerance have been identified, but the molecular mechanisms involved are less well understood than those involved in S-heat tolerance. To elucidate the mechanisms, we isolated the new sensitive to long-term heat5 (sloh5) mutant from EMS-mutagenized seeds of L-heat-tolerant Col-0. The sloh5 mutant was hypersensitive to L-heat but not to S-heat, osmo-shock, salt-shock or oxidative stress. The causal gene, SLOH5, is identical to elongatedmitochondria1 (ELM1), which plays an important role in mitochondrial fission in conjunction with dynamin-related proteins DRP3A and DRP3B. Transcript levels of ELM1, DRP3A and DRP3B were time-dependently increased by L-heat stress, and drp3a drp3b double mutants were hypersensitive to L-heat stress. The sloh5 mutant contained massively elongated mitochondria. L-heat stress caused mitochondrial dysfunction and cell death in sloh5. Furthermore, WT plants treated with a mitochondrial myosin ATPase inhibitor were hypersensitive to L-heat stress. These findings suggest that mitochondrial fission and function are important in L-heat tolerance of Arabidopsis.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"296-304"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39781238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Diminished Auxin Signaling Triggers Cellular Reprogramming by Inducing a Regeneration Factor in the Liverwort Marchantia polymorpha. 生长素信号减少通过诱导再生因子触发细胞重编程。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcac004

Sakiko Ishida, Hidemasa Suzuki, Aya Iwaki, Shogo Kawamura, Shohei Yamaoka, Mikiko Kojima, Yumiko Takebayashi, Katsushi Yamaguchi, Shuji Shigenobu, Hitoshi Sakakibara, Takayuki Kohchi, Ryuichi Nishihama

{"title":"Diminished Auxin Signaling Triggers Cellular Reprogramming by Inducing a Regeneration Factor in the Liverwort Marchantia polymorpha.","authors":"Sakiko Ishida, Hidemasa Suzuki, Aya Iwaki, Shogo Kawamura, Shohei Yamaoka, Mikiko Kojima, Yumiko Takebayashi, Katsushi Yamaguchi, Shuji Shigenobu, Hitoshi Sakakibara, Takayuki Kohchi, Ryuichi Nishihama","doi":"10.1093/pcp/pcac004","DOIUrl":"https://doi.org/10.1093/pcp/pcac004","url":null,"abstract":"Regeneration in land plants is accompanied by the establishment of new stem cells, which often involves reactivation of the cell division potential in differentiated cells. The phytohormone auxin plays pivotal roles in this process. In bryophytes, regeneration is enhanced by the removal of the apex and repressed by exogenously applied auxin, which has long been proposed as a form of apical dominance. However, the molecular basis behind these observations remains unexplored. Here, we demonstrate that in the liverwort Marchantia polymorpha, the level of endogenous auxin is transiently decreased in the cut surface of decapitated explants, and identify by transcriptome analysis a key transcription factor gene, LOW-AUXIN RESPONSIVE (MpLAXR), which is induced upon auxin reduction. Loss of MpLAXR function resulted in delayed cell cycle reactivation, and transient expression of MpLAXR was sufficient to overcome the inhibition of regeneration by exogenously applied auxin. Furthermore, ectopic expression of MpLAXR caused cell proliferation in normally quiescent tissues. Together, these data indicate that decapitation causes a reduction of auxin level at the cut surface, where, in response, MpLAXR is up-regulated to trigger cellular reprogramming. MpLAXR is an ortholog of Arabidopsis ENHANCER OF SHOOT REGENERATION 1/DORNRÖSCHEN, which has dual functions as a shoot regeneration factor and a regulator of axillary meristem initiation, the latter of which requires a low auxin level. Thus, our findings provide insights into stem cell regulation as well as apical dominance establishment in land plants.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"384-400"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39887963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Adaptive Diversification in the Cellular Circadian Behavior of Arabidopsis Leaf- and Root-Derived Cells. 拟南芥叶源性和根源性细胞昼夜行为的适应性多样化。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcac008

Shunji Nakamura, Tokitaka Oyama

{"title":"Adaptive Diversification in the Cellular Circadian Behavior of Arabidopsis Leaf- and Root-Derived Cells.","authors":"Shunji Nakamura, Tokitaka Oyama","doi":"10.1093/pcp/pcac008","DOIUrl":"https://doi.org/10.1093/pcp/pcac008","url":null,"abstract":"The plant circadian system is based on self-sustained cellular oscillations and is utilized to adapt to daily and seasonal environmental changes. The cellular circadian clocks in the above- and belowground plant organs are subjected to diverse local environments. Individual cellular clocks are affected by other cells/tissues in plants, and the intrinsic circadian properties of individual cells remain to be elucidated. In this study, we monitored bioluminescence circadian rhythms of individual protoplast-derived cells from leaves and roots of a CCA1::LUC Arabidopsis transgenic plant. We analyzed the circadian properties of the leaf- and root-derived cells and demonstrated that the cells with no physical contact with other cells harbor a genuine circadian clock with ∼24-h periodicity, entrainability and temperature compensation of the period. The stability of rhythm was dependent on the cell density. High cell density resulted in an improved circadian rhythm of leaf-derived cells while this effect was observed irrespective of the phase relation between cellular rhythms. Quantitative and statistical analyses for individual cellular bioluminescence rhythms revealed a difference in amplitude and precision of light/dark entrainment between the leaf- and root-derived cells. Circadian systems in the leaves and roots are diversified to adapt to their local environments at the cellular level.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"421-432"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39962171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chlorophyll and Pheophytin Dephytylating Enzymes Required for Efficient Repair of PSII in Synechococcus elongatus PCC 7942. 长聚球菌PCC 7942有效修复PSII所需的叶绿素和叶绿素脱植酶

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcac006

Nobuyuki Takatani, Makoto Uenosono, Yuriko Hara, Hisanori Yamakawa, Yuichi Fujita, Tatsuo Omata

{"title":"Chlorophyll and Pheophytin Dephytylating Enzymes Required for Efficient Repair of PSII in Synechococcus elongatus PCC 7942.","authors":"Nobuyuki Takatani, Makoto Uenosono, Yuriko Hara, Hisanori Yamakawa, Yuichi Fujita, Tatsuo Omata","doi":"10.1093/pcp/pcac006","DOIUrl":"https://doi.org/10.1093/pcp/pcac006","url":null,"abstract":"The Chlorophyll Dephytylase1 (CLD1) and pheophytinase (PPH) proteins of Arabidopsis thaliana are homologous proteins characterized respectively as a dephytylase for chlorophylls (Chls) and pheophytin a (Phein a) and a Phein a-specific dephytylase. Three genes encoding CLD1/PPH homologs (dphA1, dphA2 and dphA3) were found in the genome of the cyanobacterium Synechococcus elongatus PCC 7942 and shown to be conserved in most cyanobacteria. His6-tagged DphA1, DphA2 and DphA3 proteins were expressed in Escherichia coli, purified to near homogeneity, and shown to exhibit significant levels of dephytylase activity for Chl a and Phein a. Each DphA protein showed similar dephytylase activities for Chl a and Phein a, but the three proteins were distinct in their kinetic properties, with DphA3 showing the highest and lowest Vmax and Km values, respectively, among the three. Transcription of dphA1 and dphA3 was enhanced under high-light conditions, whereas that of dphA2 was not affected by the light conditions. None of the dphA single mutants of S. elongatus showed profound growth defects under low (50 µmol photons m-2 s-1) or high (400 µmol photons m-2 s-1) light conditions. The triple dphA mutant did not show obvious growth defects under these conditions, either, but under illumination of 1,000 µmol photons m-2 s-1, the mutant showed more profound growth retardation compared with wild type (WT). The repair of photodamaged photosystem II (PSII) was much slower in the triple mutant than in WT. These results revealed that dephytylation of Chl a or Phein a or of both is required for efficient repair of photodamaged PSII.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"410-420"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39817414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Sphingolipid-Induced Programmed Cell Death is a Salicylic Acid and EDS1-Dependent Phenotype in Arabidopsis Fatty Acid Hydroxylase (Fah1, Fah2) and Ceramide Synthase (Loh2) Triple Mutants. 鞘脂诱导的程序性细胞死亡是拟南芥脂肪酸羟化酶(Fah1, Fah2)和神经酰胺合成酶(Loh2)三重突变体中水杨酸和eds1依赖的表型。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcab174

Stefanie König, Jasmin Gömann, Agnieszka Zienkiewicz, Krzysztof Zienkiewicz, Dorothea Meldau, Cornelia Herrfurth, Ivo Feussner

{"title":"Sphingolipid-Induced Programmed Cell Death is a Salicylic Acid and EDS1-Dependent Phenotype in Arabidopsis Fatty Acid Hydroxylase (Fah1, Fah2) and Ceramide Synthase (Loh2) Triple Mutants.","authors":"Stefanie König, Jasmin Gömann, Agnieszka Zienkiewicz, Krzysztof Zienkiewicz, Dorothea Meldau, Cornelia Herrfurth, Ivo Feussner","doi":"10.1093/pcp/pcab174","DOIUrl":"https://doi.org/10.1093/pcp/pcab174","url":null,"abstract":"Ceramides (Cers) and long-chain bases (LCBs) are plant sphingolipids involved in the induction of plant programmed cell death (PCD). The fatty acid hydroxylase mutant fah1 fah2 exhibits high Cer levels and moderately elevated LCB levels. Salicylic acid glucoside level is increased in this mutant, but no cell death can be detected by trypan blue staining. To determine the effect of Cers with different chain lengths, fah1 fah2 was crossed with ceramide synthase mutants longevity assurance gene one homologue1-3 (loh1, loh2 and loh3). Surprisingly, only triple mutants with loh2 show cell death detected by trypan blue staining under the selected conditions. Sphingolipid profiling revealed that the greatest differences between the triple mutant plants are in the LCB and LCB-phosphate (LCB-P) fraction. fah1 fah2 loh2 plants accumulate LCB d18:0, LCB t18:0 and LCB-P d18:0. Crossing fah1 fah2 loh2 with the salicylic acid (SA) synthesis mutant sid2-2 and with the SA signaling mutants enhanced disease susceptibility 1-2 (eds1-2) and phytoalexin deficient 4-1 (pad4-1) revealed that lesions are SA- and EDS1-dependent. These quadruple mutants also confirm that there may be a feedback loop between SA and sphingolipid metabolism as they accumulated less Cers and LCBs. In conclusion, PCD in fah1 fah2 loh2 is a SA- and EDS1-dependent phenotype, which is likely due to accumulation of LCBs.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"317-325"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8917834/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39589731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Phytochrome B Conveys Low Ambient Temperature Cues to the Ethylene-Mediated Leaf Senescence in Arabidopsis. 光敏色素B向乙烯介导的拟南芥叶片衰老传递低温信号。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-03-11 DOI: 10.1093/pcp/pcab178

June-Hee Lee, Young-Joon Park, Jae Young Kim, Chung-Mo Park

{"title":"Phytochrome B Conveys Low Ambient Temperature Cues to the Ethylene-Mediated Leaf Senescence in Arabidopsis.","authors":"June-Hee Lee, Young-Joon Park, Jae Young Kim, Chung-Mo Park","doi":"10.1093/pcp/pcab178","DOIUrl":"https://doi.org/10.1093/pcp/pcab178","url":null,"abstract":"Leaf senescence is an active developmental process that is tightly regulated through extensive transcriptional and metabolic reprogramming events, which underlie controlled degradation and relocation of nutrients from aged or metabolically inactive leaves to young organs. The onset of leaf senescence is coordinately modulated by intrinsic aging programs and environmental conditions, such as prolonged darkness and temperature extremes. Seedlings growing under light deprivation, as often experienced in severe shading or night darkening, exhibit an accelerated senescing process, which is mediated by a complex signaling network that includes sugar starvation responses and light signaling events via the phytochrome B (phyB)-PHYTOCHROME-INTERACTING FACTOR (PIF) signaling routes. Notably, recent studies indicate that nonstressful ambient temperatures profoundly influence the onset and progression of leaf senescence in darkness, presumably mediated by the phyB-PIF4 signaling pathways. However, it is not fully understood how temperature signals regulate leaf senescence at the molecular level. Here, we demonstrated that low ambient temperatures repress the nuclear export of phyB and the nuclear phyB suppresses the transcriptional activation activity of ethylene signaling mediator ETHYLENE INSENSITIVE3 (EIN3), thus delaying leaf senescence. Accordingly, leaf senescence was insensitive to low ambient temperatures in transgenic plants overexpressing a constitutively nuclear phyB form, as observed in ein3 eil1 mutants. In contrast, leaf senescence was significantly promoted in phyB-deficient mutants under identical temperature conditions. Our data indicate that phyB coordinately integrates light and temperature cues into the EIN3-mediated ethylene signaling pathway that regulates leaf senescence under light deprivation, which would enhance plant fitness under fluctuating natural environments.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"326-339"},"PeriodicalIF":4.9,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39621475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Conserved Two-component Hik2-Rre1 Signaling Is Activated Under Temperature Upshift and Plastoquinone-reducing Conditions in the Cyanobacterium Synechococcus elongatus PCC 7942. 在温度升高和质体醌还原条件下，长聚藻球菌PCC 7942中保守双组分Hik2-Rre1信号被激活

IF 4.9

Plant & Cell Physiology Pub Date : 2022-02-15 DOI: 10.1093/pcp/pcab158

Nachiketa Bairagi, Satoru Watanabe, Kaori Nimura-Matsune, Kenya Tanaka, Tatsuhiro Tsurumaki, Shuji Nakanishi, Kan Tanaka

{"title":"Conserved Two-component Hik2-Rre1 Signaling Is Activated Under Temperature Upshift and Plastoquinone-reducing Conditions in the Cyanobacterium Synechococcus elongatus PCC 7942.","authors":"Nachiketa Bairagi, Satoru Watanabe, Kaori Nimura-Matsune, Kenya Tanaka, Tatsuhiro Tsurumaki, Shuji Nakanishi, Kan Tanaka","doi":"10.1093/pcp/pcab158","DOIUrl":"https://doi.org/10.1093/pcp/pcab158","url":null,"abstract":"The highly conserved Hik2-Rre1 two-component system is a multi-stress responsive signal-transducing module that controls the expression of hsp and other genes in cyanobacteria. Previously, we found in Synechococcus elongatus PCC 7942 that the heat-inducible phosphorylation of Rre1 was alleviated in a hik34 mutant, suggesting that Hik34 positively regulates signaling. In this study, we examined the growth of the hik34 deletion mutant in detail, and newly identified suppressor mutations located in rre1 or sasA gene negating the phenotype. Subsequent analyses indicated that heat-inducible Rre1 phosphorylation is dependent on Hik2 and that Hik34 modulates this Hik2-dependent response. In the following part of this study, we focused on the mechanism to control the Hik2 activity. Other recent studies reported that Hik2 activity is regulated by the redox status of plastoquinone (PQ) through the 3Fe-4S cluster attached to the cyclic GMP, adenylyl cyclase, FhlA (GAF) domain. Consistent with this, Rre1 phosphorylation occurred after the addition of 2,5-dibromo-6-isopropyl-3-methyl-1,4-benzoquinone but not after the addition of 3-(3,4-dichlorophenyl)-1,1-dimethylurea to the culture medium, which corresponded to PQ-reducing or -oxidizing conditions, respectively, suggesting that the Hik2-to-Rre1 phosphotransfer was activated under PQ-reducing conditions. However, there was no correlation between the measured PQ redox status and Rre1 phosphorylation during the temperature upshift. Therefore, changes in the PQ redox status are not the direct reason for the heat-inducible Rre1 phosphorylation, while some redox regulation is likely involved as oxidation events dependent on 2,6-dichloro-1,4-benzoquinone prevented heat-inducible Rre1 phosphorylation. On the basis of these results, we propose a model for the control of Hik2-dependent Rre1 phosphorylation.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"176-188"},"PeriodicalIF":4.9,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39691102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Photosynthesis and Cell Growth Trigger Degradation of Phycobilisomes during Nitrogen Limitation. 氮限制期间光合作用和细胞生长触发藻胆体降解。

IF 4.9

Plant & Cell Physiology Pub Date : 2022-02-15 DOI: 10.1093/pcp/pcab159

Akiko Yoshihara, Koichi Kobayashi

{"title":"Photosynthesis and Cell Growth Trigger Degradation of Phycobilisomes during Nitrogen Limitation.","authors":"Akiko Yoshihara, Koichi Kobayashi","doi":"10.1093/pcp/pcab159","DOIUrl":"https://doi.org/10.1093/pcp/pcab159","url":null,"abstract":"Under nitrogen (N)-limited conditions, the non-N2-fixing cyanobacterium Synechocystis sp. PCC 6803 (Synechocystis 6803) actively grows during early stages of starvation by performing photosynthesis but gradually stops the growth and eventually enters dormancy to withstand long-term N limitation. During N limitation, Synechocystis 6803 cells degrade the large light-harvesting antenna complex phycobilisomes (PBSs) presumably to avoid excess light absorption and to reallocate available N to essential functions for growth and survival. These two requirements may be driving forces for PBS degradation during N limitation, but how photosynthesis and cell growth affect PBS degradation remains unclear. To address this question, we examined involvements of photosynthesis and cell growth in PBS degradation during N limitation. Treatment of photosynthesis inhibitors and shading suppressed PBS degradation and caused non-bleaching of cells during N limitation. Limitations of photosynthesis after initial gene responses to N limitation suppressed PBS degradation, implying that photosynthesis affects PBS degradation in a post-translational manner. In addition, limitations of cell growth by inhibition of peptidoglycan and fatty acid biosynthesis, low growth temperature and phosphorous starvation suppressed PBS degradation during N limitation. Because decreased photosynthetic activity led to decreased cell growth, and vice versa, photosynthesis and cell growth would inseparably intertwine each other and affect PBS degradation during N limitation in a complex manner. Our data shed light on the coordination mechanisms among photosynthesis, cell growth and PBS degradation during N limitation.","PeriodicalId":502140,"journal":{"name":"Plant & Cell Physiology","volume":" ","pages":"189-199"},"PeriodicalIF":4.9,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39925073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2