American Chestnut Research & Restoration Project
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1 American Chestnut Research & Restoration Project SUNY-ESF C.A. Maynard, L.D. McGuigan, S.A. Merkle, and W.A. Powell IFB Meeting, November 28, 2007 Species Protection Through Disease Resistance: Moving from the Lab to the Field
2 Genes & Vectors 1. Oxalate oxidase (OxO) gene from wheat A. Detoxifies oxalic acid produced by the blight fungus & protects the lignin produced by the tree p VspB-OxO, ptacf3, ptacf7, p35s-cno, p35s-oxo 2. ESF39 or ESF12 antimicrobial peptide A. Kills the blight fungus, Cryphonectria parasitica B. Might also be useful against Phytophthora cankers ptacf6, ptacf7, pcwea1 3. Chitinase from Trichoderma A. Degrades the cell wall of C. parasitica p35s-cno 4. Ac-AMP1.2 antimicrobial peptide from Amaranth pcwea1, pca1 Control vectors: pgfp & pwvk147 American chestnut Steven N. Jeffers Clemson University
3 American Chestnut Transformation & Regeneration Pipeline (~18 months) Transformation Cultures of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field Transfer every 2 weeks and visually select for fluorescent embryos Multiply embryos Multiply shoots Growth chamber & greenhouse Site prep, fertilize, weed, water, & control pests Maintain cultures of every event, transferring every 2-3 weeks Extract DNA & test for genes using PCR Extract DNA for Southern hybridization to determine insert copy number Maintain cultures of every event, transferring shoots every 4 weeks RT-PCR, enzyme assays, resistance assays, & other exp.
4 American Chestnut Transformation & Regeneration Pipeline (~18 months) Transformation Cultures of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field Wirsig WB p VspB-OxO LP-1V1 & 38 Pond1-1 p VspB-OxO LP-5V32 WB348-5 p VspB-OxO 15 Wirsig trees in the field LP-3V p VspB-OxO RR-1V4 & 13 Pond1-1 p VspB-OxO
5 American Chestnut Transformation & Regeneration Pipeline (~18 months) Transformation Cultures of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field AN-2X(1-5) WB ptacf3 (OxO) JM-1E1 Pond1-1 ptacf6 (ESF39) JM-4E2 Ellis-1 ptacf6 (ESF39) LN-1N(1-?) Pond1-1 p35s-cno (Chitinase + OxO) LN-3N(1-?) p35s-cno (Chitinase + OxO) GFP spots Shoot formation GFP expressing embryo
6 American Chestnut Transformation & Regeneration Pipeline (~18 months) Transformation Culture of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field JH-1W(1-?) Pond1-1 pwcea1 (ESF12 + AcAMP1.2) JH-3W(1-?) pwcea1 (ESF12 + AcAMP1.2) JH-1A(1-?) Pond1-1 pca1 (AcAMP1.2) JH-3A(1-?) pca1 (AcAMP1.2) TR-3X(1-?) ptacf3 (OxO) TR-1X(1-?) Pond1-1 ptacf3 (OxO) GFP spots GFP expressing embryo
7 American Chestnut Transformation & Regeneration Pipeline (~18 months) Transformation Culture of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field LN-1P(1-?) Pond1-1 ptacf7 (OxO + ESF39) AZ-1C(1-?) Pond1-1 p35s-oxo (constitutive OxO) AZ-1K(1-?) Pond1-1 pwvk147 (empty vector control)
8 American Chestnut Transformation & Regeneration Pipeline (~18 months) Transformation Cultures of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field Wirsig LP-1V1 & 38 LP-5V32 LP-3V53 RR-1V4 & 13 AN-2X(1-5) JM-1E1 JM-4E2 LN-1N(1-?) LN-3N(1-?) JH-1W(1-?) JH-3W(1-?) JH-1A(1-?) JH-3A(1-?) TR-3X(1-?) TR-1X(1-?) LN-1P(1-?) AZ-1C(1-?) AZ-1K(1-?) Transformation started Spring 2007 (therefore, estimated Fall 2008 planting) Transformation started Summer 2007 (therefore, estimated Spring 2009 planting) Transformation will start Fall 2007 (therefore, estimated Spring 2009 planting) Transformation 2006 (Spring 2008 planting)
9 Number of trees (try for minimum of 10 trees per event) Transformation Cultures of single event Shoot regeneration Rooting (or nut grafting) Acclimatization Field Wirsig LP-1V1 & 38 LP-5V32 LP-3V53 RR-1V4 & 13 AN-2X(1-5) JM-1E1 JM-4E2 LN-1N(1-?) LN-3N(1-?) JH-1W(1-?) JH-3W(1-?) JH-1A(1-?) JH-3A(1-?) TR-3X(1-?) TR-1X(1-?) LN-1P(1-?) AZ-1C(1-?) AZ-1K(1-?) Number unknown, because growth chamber optimization is being done. (Maybe 60 trees for Spring 2008?) Minimum of 70 transgenic trees for testing, hopefully more for Fall Equal number of control trees. Minimum of transgenic trees for testing. If resources allow, we would like a goal of 1000 trees in the field by Summer A total of 3000 transgenic American chestnuts by Summer Equal number of control trees.
10 Report on the 2006 & 2007 Syracuse Field Trials How is the Wirsig tree doing? The 2007 planting
11 Transgenic American chestnut Wirsig planted on 6/7/06
12 Transgenic American chestnut Wirsig a week later
13 Transgenic American chestnut Wirsig four months later
14 Transgenic American chestnut Wirsig early Spring 2007
15 Transgenic American chestnut Wirsig early August 2007
16 Wirsig Variety (LP-2V28 event) 2 growing seasons later (~15 months) White light UV+GFP filter Control Wirsig Control Wirsig Stable transformation
17 Wirsig Variety (LP-2V28 event) 2 growing seasons later (~15 months) RT-PCR OxO RNA Wirsig Control Control Wirsig OxO assays Stable transformation
18 The 2007 Planting First, we checked the roots.
19 The Planting Event
20 Chestnut Planting Planting Chestnut LaFayette Rd. Experiment Station, Syracuse, NY Row 6 Tree 1 LP28, GB4 5 LP28, GB2 4 LP28, AK7 3 LP28, AC7 Tree 2 Amer PM6, Rep2, SS3 Amer PM10, Rep2, SS3 Tree 3 LP28, AN4 Tree 4 LP28, AD11 American seedling Amer PM10, Rep 2, SS5 Amer PM3, Rep2, SS1 Amer PM3, 2 LP28, AM18 LP28, GB1 Rep2, SS4 1 LP28, AN3 Amer PM3, Rep2, SS3 Nut Graft: Nut graft: Extra Row LP1, P1-1, LP28, AD8 AO4 NGP2. Rand NGP1. nut, LP28 Wilson8 nut, scion, LP44 scion, grafted grafted 1/18/07 1/3/07 Tree 5 Amer PM3, Rep2, SS5 Amer PM10, Rep2, SS2 LP28, AD12 WIRSIG (planted 2006) Tree 6 Amer PM1, SS3 LP28, GB3 Amer PM2, Rep2, SS4 Amer PM11, Rep2, SS2 LP28, AO14 empty KEY: Shaded cells indicate transgenic American chestnut LP28 event = clone WB with pvspb-oxo LP1 event = clone Pond1-1 with pvspb-oxo LP44 event = clone WB with pvspb-oxo AN3, AO14, etc. refer to the individual rooted shoot as per Linda's records GB = transgenic LP28 from Greg Boyd's experiment (numbers were added at date of planting) American chestnuts from Alison Oakes' Potting Mix Study, spring 2007
21 Chestnut Planting Row 6 Tree 1 LP28, GB4 5 LP28, GB2 4 LP28, AK7 3 LP28, AC7 2 LP28, AM18 1 Extra Row LP1, P1-1, AO4 Tree 2 Amer PM6, Rep2, SS3 Amer PM10, Rep2, SS3 LP28, GB1 Tree 3 LP28, AN4 Amer PM3, Rep2, SS4 LP28, AN3 Amer PM3, Rep2, SS3 Nut Graft: Nut graft: NGP2. Rand NGP1. nut, LP28 Wilson8 nut, scion, grafted LP44 scion, 1/18/07 grafted 1/3/07 Tree 4 LP28, AD11 American seedling Amer PM10, Rep 2, SS5 Amer PM3, Rep2, SS1 LP28, AD8 Tree 5 Amer PM3, Rep2, SS5 Amer PM10, Rep2, SS2 LP28, AD12 WIRSIG (planted 2006) Tree 6 Amer PM1, SS3 LP28, GB3 Amer PM2, Rep2, SS4 Amer PM11, Rep2, SS2 LP28, AO14 empty The experiment contains: 12 transgenic plantlets 12 seedlings 12 American seedlings KEY: Shaded cells indicate transgenic American chestnut LP28 event = clone WB with p The trees will be inoculated when they are large enough to provide good blight-resistance evaluations (2009 or 2010?).
22 Transgenic American Chestnut The original shoot died, but the new shoot shows dramatic growth.
23 Other Ongoing or Recently Completed Projects Selecting locations for future field trials Small-stem resistance assay Potting mix study Increasing plantlet production capacity Nutgrafting
24 2008 Field Season Goals Outplant at least 10 trees from each of at least 5 transformation events (along with seedling controls) Working with the NY Chapter of TACF, identify and prepare at least three suitable sites for 2009 field tests
25 Seedling resistance assay
26 Differences in small stems American
27 Small-stem resistance assay American
28 Chestnut Potting Mix Study Experimental Design 11 Mixes 5 Seedlots 3 Replications 28
29 Potting Mixes Tested 1. La Pierre Special (2 peat: 1 vermiculite: 1 perlite) 2. Fred Hebard s Special (1 peat: 1 vermiculite: 1 perlite) 3. Faford Germinating Mix 4. Faford #52 Mix 5. Faford C1-P Growers Mix 6. Faford Nursery Mix 7. Sungro Metro Mix Sungro Metro Mix Sungro Metro Mix HP 10. Sungro Metro Mix 560 Coir 11. Standard Control La Pierre Special 29
30 Ave. Total Dry W eight (g) by Potting Mix La Pierre Special 2.Fred Hubard ᅰ s Special 3.Faford Germinating Mix 4.Faford #52 Mix 5.Faford C1- P Growers Mix 6.Faford Nursery Mix Potting Mix 7.Sungro Metro Mix Sungro Metro Mix Sungro Metro Mix HP 10.Sungro Metro Mix 560 Coir 11.Standard Control La Pierre Special 30
31 And the Winners Are: 31
32 Results Avoid: 1. La Pierre Special (2 peat: 1 vermiculite: 1 perlite) 2. Fred Hebard s Special (1 peat: 1 vermiculite: 1 perlite) 3. Faford Germinating Mix 4. Faford #52 Mix 5. Faford C1-P Growers Mix 6. Faford Nursery Mix 7. Sungro Metro Mix Sungro Metro Mix Sungro Metro Mix HP 10. Sungro Metro Mix 560 Coir 11. Standard Control La Pierre Special 32
33 #8 - Sungro Metro Mix 390 #9 - Sungro Metro Mix HP 33
34 Building Capacity Greenhouse renovations Pouring a new floor - completed Installing new high-intensity lighting - ongoing Installing humidity control - design phase Replacing the growth room - ongoing
35 Our old growth room (the dungeon ) has seen better days. At least 30 years old Limited shelf space Very unreliable
36 The new growth chambers are assembled and on their way.
37 Ongoing Activities Regenerating transgenic cell lines Building up stock plants Optimizing acclimatization parameters
38 Nutgrafting Using American Chestnut Tissue Culture Shoots Linda McGuigan
39
40 Questions?
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