Plant Root最新文献_第5页

Effect of Pseudomonas fluorescens inoculation on the improvement of iron deficiency in tomato 接种荧光假单胞菌对改善番茄缺铁状况的影响

IF 0.6

Plant Root Pub Date : 2017-01-01 DOI: 10.3117/PLANTROOT.11.1

Takeshi Nagata

引用次数: 9

Changes in SOD isozyme in mycorrhizal asparagus inoculated with Fusarium oxysporum 接种尖孢镰刀菌后菌根芦笋SOD同工酶的变化

IF 0.6

Plant Root Pub Date : 2016-01-01 DOI: 10.3117/PLANTROOT.10.26

Jia Liu, Y. Matsubara

{"title":"Changes in SOD isozyme in mycorrhizal asparagus inoculated with Fusarium oxysporum","authors":"Jia Liu, Y. Matsubara","doi":"10.3117/PLANTROOT.10.26","DOIUrl":"https://doi.org/10.3117/PLANTROOT.10.26","url":null,"abstract":": Symbiosis-specific changes in antioxidative ability and superoxide dismutase (SOD) isozyme in mycorrhizal asparagus plants through the inoculation with Fusarium oxysporum f. sp. asparagi (Foa, MAFF305556) were investigated. Dry weight of shoots and roots increased more in AMF (Gi, Glomus intraradices ; GM, Gigaspora margarita )-inoculated plants than the control. Eight weeks after Foa inoculation, the incidence and severity of Fusarium root rot were alleviated in both AMF-inoculated plants, compared to the control, which were not alleviated. Superoxide dismutase (SOD) activity, ascorbate peroxidase (APX) activity, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity increased in both AMF-in-oculated plants more than in the control before and after Foa inoculation, and increased in all asparagus roots due to Foa inoculation. As for SOD isozymes in roots before Foa inoculation, the Rf = 0.37 (Cu/Zn-SOD) band had a higher intensity in both Gi and GM compared to the control. Eight weeks after Foa inoculation, Rf = 0.33 and 0.37 (Cu/Zn-SODs) showed a higher intensity in both Gi and GM compared to the control. Though AM fungal difference appeared in the intensity of Rf = 0.25 (Mn/Fe-SOD); GM had a higher intensity than Gi, Cu/Zn bands had a clearly higher intensity than Mn/Fe band. These findings supposed that tolerance to Fusarium root rot in mycorrhizal asparagus plants might be closely associated with the changes in SOD activity and isozymes, especially in Cu/ Zn-SODs.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.10.26","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69620790","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

Se(IV), Se(VI), Cu and Zn phytotoxicity in correlation to their accumulation in Sinapis alba L. seedlings Se(IV)、Se(VI)、Cu和Zn在白杨幼苗体内积累的植物毒性研究

IF 0.6

Plant Root Pub Date : 2016-01-01 DOI: 10.3117/PLANTROOT.10.11

M. Molnárová, A. Fargašová

{"title":"Se(IV), Se(VI), Cu and Zn phytotoxicity in correlation to their accumulation in Sinapis alba L. seedlings","authors":"M. Molnárová, A. Fargašová","doi":"10.3117/PLANTROOT.10.11","DOIUrl":"https://doi.org/10.3117/PLANTROOT.10.11","url":null,"abstract":"Phytotoxicity of Se(IV), Se(VI), Cu and Zn to Sinapis alba L. seedlings was expressed by inhibition of selected physiological processes (root and shoot growth, fresh and dry biomass production, water content) and correlated with their bioaccumulation. Roots growth was inhibited more than that of shoots and only Se(IV) reduced also shoots growth (IC50= 25.8 mg L). Se(VI) decreased more roots (IC50= 23.6 mg L) than shoots growth (IC50= 461.4 mg L). Phytotoxicity to roots growth increased as follows: Zn < Se(VI)≅Cu < Se(IV). All metals, except Cu, decreased more roots and shoots fresh mass than that of dry mass. Water content was for all (semi)metals more depressed in shoots, however, for Zn any significant changes in roots WC were confirmed. In any case transportation index Ti overreached value 1 and that indicate metals storage in the roots; however, for control the opposite results were obtained. While the highest bioaccumulation factor (BAF) was determined for Cu in both roots (1.016) and shoots (0.271) the lowest values for this parameter were confirmed for Se(VI) in the roots (0.061) and for Se(IV) in the shoots (0.010). While in the control Cu, Se and Zn content was higher in the shoots, treatment with these metals increased their accumulation mainly in the roots. Statistically negative correlation was confirmed among Se(IV), Se(VI) and Cu accumulation in the roots and water content in the roots, and among Se(IV) and Cu accumulation in the roots and water content in the shoots.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.10.11","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69620721","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

Comparison of root growth angles of wheat cultivars grown in a hydrogel polymer medium 水凝胶聚合物培养基中小麦品种根系生长角的比较

IF 0.6

Plant Root Pub Date : 2016-01-01 DOI: 10.3117/PLANTROOT.10.4

Hirotake Ito, Miki Kaneko, Takatoshi Nakamura, Yozo Nakazawa, H. Yoshida

引用次数: 1

Chemical and air pruning of roots influence post-transplant root traits of the critically endangered Serianthes nelsonii 根系化学和空气修剪对极危植物水芹移栽后根系性状的影响

IF 0.6

Plant Root Pub Date : 2016-01-01 DOI: 10.3117/PLANTROOT.10.21

T. Marler, Cameron Musser

{"title":"Chemical and air pruning of roots influence post-transplant root traits of the critically endangered Serianthes nelsonii","authors":"T. Marler, Cameron Musser","doi":"10.3117/PLANTROOT.10.21","DOIUrl":"https://doi.org/10.3117/PLANTROOT.10.21","url":null,"abstract":"Container production of Serianthes nelsonii Merr. plants for out-planting within the endemic range is a major component of the plan to recover the critically endangered tree species. We exploited the ability to prune roots with copper or with strategically placed air holes in container walls to determine if root quantity or quality would increase in comparison to traditional container design. Following 23 days of growth after transplanting, new root length and root dry weight did not differ among the container types. However, most roots from the control and copper-treated containers developed from the bottom of the root system, and direction of root growth was primarily geotropic. In contrast, the air-pruning containers produced plants with plagiotropic root growth near the soil surface. Root growth was positioned with 58% in the top two-thirds of a rhizotron window for the air-pruning, 29% for the copper-pruning, and 16% for the control containers. Our results indicate that direction but not length or dry weight of post-transplant root growth was changed by use of air-pruning containers. For a critically endangered tree like Serianthes nelsonii, the improved root morphology afforded by containers that use air-pruning of roots in the nursery may improve tree stability following transplanting.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.10.21","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69620778","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: 11

Recent advances in woody plant: Preface to a special issue in Plant Root 木本植物的最新进展:《植物根》专刊前言

IF 0.6

Plant Root Pub Date : 2015-12-31 DOI: 10.3117/PLANTROOT.9.68

Takuo Hishi, M. Dannoura, I. Karahara

引用次数: 0

Spatial patterns of fine root biomass and performances of understory dwarf bamboo and trees along with the gradient of soil N availability in broad-leaved natural forests and larch plantation 阔叶天然林和落叶松人工林林下矮竹和乔木细根生物量和性能随土壤氮有效性梯度的空间格局

IF 0.6

Plant Root Pub Date : 2015-12-31 DOI: 10.3117/PLANTROOT.9.85

Takuo Hishi, Naoaki Tashiro, Yuka Maeda, R. Urakawa, H. Shibata

{"title":"Spatial patterns of fine root biomass and performances of understory dwarf bamboo and trees along with the gradient of soil N availability in broad-leaved natural forests and larch plantation","authors":"Takuo Hishi, Naoaki Tashiro, Yuka Maeda, R. Urakawa, H. Shibata","doi":"10.3117/PLANTROOT.9.85","DOIUrl":"https://doi.org/10.3117/PLANTROOT.9.85","url":null,"abstract":"The importance of fine roots in forest ecosystem processes is well known. However, the contribution of understory vegetation to underground ecosystem processes is not well understood. We tested the hypothesis that fine-root biomass (FRB) and performance of the overstory and understory independently decrease with increasing soil N availability in cool-temperate deciduous broad-leaved natural forests and larch plantations in Japan. The mean contribution of understory FRB to total FRB (tree + understory) ranged from 4% to 78% (mean 37%). Tree FRB was negatively correlated with understory FRB, and understory FRB was dominant to tree FRB in infertile soil. Understory and total FRB were negatively correlated with soil net N mineralization rate, whereas tree FRB showed a quadratic relationship with soil N mineralization rate with the peak observed at mineralization of 58.4 kg N ha−1 y−1. The low tree FRB at infertile sites may be due to a belowground competitive effect of understory fine roots on tree FRB. Understory fine-root nitrogen concentration (FRN) and leaf to fine-root (L/FR) ratio were positively correlated with N mineralization rate. However, tree L/FR was not significantly correlated, whereas tree FRN was positively correlated, with soil N mineralization rate, suggesting that the leaf production efficiency of trees might not increase even on infertile soil. We suggest that belowground processes of overstory trees might change depending on understory vegetation, and that understory vegetation might affect the fine roots of overstory trees, which did not increase mass allocation but increased N use efficiency under low FRN.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.9.85","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69623008","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: 8

A little sorrow and some notable joys of the year 今年有一点悲伤，也有一些值得注意的快乐

IF 0.6

Plant Root Pub Date : 2015-03-13 DOI: 10.3117/PLANTROOT.9.1

I. Karahara

引用次数: 0

Catechin production in roots of Thujopsis dolabrata var. hondai in soils on Mt. Hayachine with high Ni concentrations 在高Ni浓度的哈亚钦山土壤中，日本土参根中儿茶素的产生

IF 0.6

Plant Root Pub Date : 2015-01-01 DOI: 10.3117/PLANTROOT.9.70

S. Okimura, K. Yamaji, G. Hitsuma, S. Mori

{"title":"Catechin production in roots of Thujopsis dolabrata var. hondai in soils on Mt. Hayachine with high Ni concentrations","authors":"S. Okimura, K. Yamaji, G. Hitsuma, S. Mori","doi":"10.3117/PLANTROOT.9.70","DOIUrl":"https://doi.org/10.3117/PLANTROOT.9.70","url":null,"abstract":"Mt. Hayachine in Iwate prefecture is characterized by serpentine site, which is known to have high concentrations of Ni. In general, few plants that can tolerate high concentrations of Ni can grow in serpentine soil. Thujopsis dolabrata var. hondai occurs naturally on Mt. Hayachine. In this study, we hypothesized that T. dolabrata var. hondai shows Ni tolerance due to detoxification by phenolics. We collected T. dolabrata var. hondai seedlings and root-zone soil from the Kadoma National Forest on Mt. Hayachine to analyze the concentrations of Ni, other heavy metals, and macronutrients. The seedling roots had high concentrations of Ni. Further, we conducted a pot experiment by using 1-month-old sterile seedlings grown in three types of sterilized soils—Kadoma soil (obtained from the Kadoma National Forest), Tsugaru forest soil, and nursery soil—and compared the concentrations of Ni, nutrients, and catechin, as well as the growth of seedlings in the different soils. The pot experiment indicated that the roots of seedlings grown in Kadoma forest soil contained high concentrations of Ni and catechin, which could act as an antioxidant and a possible Ni-chelating compound that detoxified Ni in the plant cells. We concluded that T. dolabrata var. hondai seedlings growing in the serpentine site of Mt. Hayachine accumulated Ni and could detoxify it by producing high concentrations of catechin.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3117/PLANTROOT.9.70","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69622950","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

Changes in the carbon and nutrient status of Cryptomeria japonica needles and fine roots following 7 years of nitrogen addition 加氮7年后柳杉针叶和细根碳和营养状况的变化

IF 0.6

Plant Root Pub Date : 2015-01-01 DOI: 10.3117/PLANTROOT.9.95

Junko Nagakura, A. Akama, H. Shigenaga, T. Mizoguchi, T. Yamanaka, Ayumi Tanaka‐Oda, T. Tange

{"title":"Changes in the carbon and nutrient status of Cryptomeria japonica needles and fine roots following 7 years of nitrogen addition","authors":"Junko Nagakura, A. Akama, H. Shigenaga, T. Mizoguchi, T. Yamanaka, Ayumi Tanaka‐Oda, T. Tange","doi":"10.3117/PLANTROOT.9.95","DOIUrl":"https://doi.org/10.3117/PLANTROOT.9.95","url":null,"abstract":"Anthropogenically increased nitrogen (N) deposition may affect the nutrient dynamics of forested ecosystems. To investigate the potential effects of excessive N deposition on Japanese forests, we treated the soil in a 20-year-old Japanese cedar (Cryptomeria japonica) stand with 10 l m −2 of 10 mM HNO3 solution, 10 mM NH4NO3 solution, or tap water (as a control), monthly for 7 years. A total of 168 and 336 kg N ha −1 year −1 was added in the HNO3 and NH4NO3 plots, respectively. Tree growth, the amount of nutrients and the carbon concentration of both current shoots and fine roots (<2 mm in diameter) in the surface soil (0-5 cm) were measured. The foliar N concentration increased in both N-fertilized plots during the first 3 years, particularly in the NH4NO3 plots. Similarly, the fine-root N concentration was greater in the N-fertilized plots than in the control plots. However, growth in both height and diameter at breast height of Japanese cedar trees were not significantly affected by N fertilization. The foliar K and P concentrations tended to decrease in treatment plots over time when compared with the control plots. Our study suggests that 7 years of excessive N fertilization had no positive or negative effect on the growth of young Japanese cedar trees, although the nutrient status of current shoots and fine roots was altered.","PeriodicalId":20205,"journal":{"name":"Plant Root","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2015-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69623017","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