Robert B. Hutmacher
University of California, Davis
Publications 52
#1Cheng Gao (University of California, Berkeley)H-Index: 11
#2Liliam Montoya (University of California, Berkeley)H-Index: 3
Last.John W. Taylor (University of California, Berkeley)H-Index: 83
view all 13 authors...
Community assembly of crop-associated fungi is thought to be strongly influenced by deterministic selection exerted by the plant host, rather than stochastic processes. Here we use a simple, sorghum system with abundant sampling to show that stochastic forces (drift or stochastic dispersal) act on fungal community assembly in leaves and roots early in host development and when sorghum is drought stressed, conditions when mycobiomes are small. Unexpectedly, we find no signal for stochasticity whe...
#1Mowei Zhou (Environmental Molecular Sciences Laboratory)H-Index: 12
#2Neha Malhan (Environmental Molecular Sciences Laboratory)H-Index: 1
Last.Ljiljana Paša-Tolić (Environmental Molecular Sciences Laboratory)H-Index: 42
view all 14 authors...
Abstract Sorghum [Sorghum bicolor (L.) Moench] is an important cereal crop noted for its ability to survive water-limiting conditions. Herein, we present an analytical workflow to explore the changes in histone modifications through plant developmental stages and two drought stresses in two sorghum genotypes that differ in their response to drought. Top-down mass spectrometry (MS) is an ideal method to profile histone modifications and distinguish closely related histone proteoforms. We analyzed...
#1Cheng Gao (University of California, Berkeley)H-Index: 11
#2Liliam Montoya (University of California, Berkeley)H-Index: 3
Last.John W. Taylor (University of California, Berkeley)H-Index: 83
view all 11 authors...
The ecology of fungi lags behind that of plants and animals because most fungi are microscopic and hidden in their substrates. Here, we address the basic ecological process of fungal succession in nature using the microscopic, arbuscular mycorrhizal fungi (AMF) that form essential mutualisms with 70–90% of plants. We find a signal for temporal change in AMF community similarity that is 40-fold stronger than seen in the most recent studies, likely due to weekly samplings of roots, rhizosphere and...
5 CitationsSource
#1Jennifer E. Spindel (JGI: Joint Genome Institute)H-Index: 1
#2J. A. DahlbergH-Index: 16
Last.John P. Vogel (JGI: Joint Genome Institute)H-Index: 43
view all 9 authors...
Sorghum bicolor is the fifth most commonly grown cereal worldwide and is remarkable for its drought and abiotic stress tolerance. For these reasons and the large size of biomass varieties, it has been proposed as a bioenergy crop. However, little is known about the genes underlying sorghum’s abiotic stress tolerance and biomass yield. To uncover the genetic basis of drought tolerance in sorghum at a genome-wide level, we undertook a high-density phenomics genome wide association study (GWAS) in ...
1 CitationsSource
#1Ling Xu (University of California, Berkeley)H-Index: 4
#2Dan Naylor (University of California, Berkeley)H-Index: 4
Last.Devin Coleman-Derr (University of California, Berkeley)H-Index: 26
view all 23 authors...
Drought stress is a major obstacle to crop productivity, and the severity and frequency of drought are expected to increase in the coming century. Certain root-associated bacteria have been shown to mitigate the negative effects of drought stress on plant growth, and manipulation of the crop microbiome is an emerging strategy for overcoming drought stress in agricultural systems, yet the effect of drought on the development of the root microbiome is poorly understood. Through 16S rRNA amplicon a...
28 CitationsSource
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#1Mauricio Ulloa (ARS: Agricultural Research Service)H-Index: 23
#2Congli Wang (CAS: Chinese Academy of Sciences)H-Index: 13
Last.Philip A. Roberts (UC: University of California)H-Index: 12
view all 8 authors...
Chromosome substitution (CS) lines in plants are a powerful genetic resource for analyzing the contribution of chromosome segments to phenotypic variance. In this study, a series of interspecific cotton (Gossypium spp.) CS lines were used to identify a new germplasm resource, and to validate chromosomal regions and favorable alleles associated with nematode or fungal disease resistance traits. The CS lines were developed in the G. hirsutum L. TM-1 background with chromosome or chromosome segment...
8 CitationsSource
#1Mauricio Ulloa (ARS: Agricultural Research Service)H-Index: 23
#2Robert B. Hutmacher (UC Davis: University of California, Davis)H-Index: 14
Last.John J. Burke (ARS: Agricultural Research Service)H-Index: 35
view all 5 authors...
#1Steven D. Wright (University of California, Berkeley)H-Index: 11
#2Robert B. Hutmacher (UC Davis: University of California, Davis)H-Index: 14
Last.M. P. Keeley (University of California, Berkeley)H-Index: 2
view all 8 authors...
Chemical defoliation is a necessary pre-harvest practice in Pima cotton (Gossypium barbadense L.) production in California. Growers begin defoliating as early as possible but yield and quality loss can occur if the bolls are not fully mature. Harvest aids can advance harvest dates, avoid late-season pests, and adverse weather conditions in California. A study was conducted on Pima cotton, cv. ‘Phytogen-802’. Different rates of Ginstar (ai thidiazuron/diuron, Bayer CropScience) or Ginstar plus Fi...
2 CitationsSource
#2Tom W. AllenH-Index: 8
Last.Ryan DavisH-Index: 26
view all 12 authors...
Fusarium wilt is an important and widespread disease of cotton (Gossypium hirsutum L. and Gossypium barbadense L.) caused by several races and genotypes of Fusarium oxysporum f. sp. vasinfectum W.C. Snyder & H.N. Hans (FOV). A two-year survey (2012-2013) was conducted to assess the distribution of the fungus, and in particular FOV race 4, throughout the United States (U.S.) Cotton Belt. Partial sequences of the translation elongation factor (EF-1α) region of FOV cultured from symptomatic cotton ...