東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Physiological and growth responses o...

Nickum, Mark Thomas.

FindBook

Google Book

Amazon

博客來

Physiological and growth responses of mamey sapote (Pouteria sapota) to flooding.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Physiological and growth responses of mamey sapote (Pouteria sapota) to flooding./
作者:	Nickum, Mark Thomas.
面頁冊數:	144 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 3846.
Contained By:	Dissertation Abstracts International70-07B.
標題:	Biology, Botany. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3367566
ISBN:	9781109280586

Physiological and growth responses of mamey sapote (Pouteria sapota) to flooding.
Nickum, Mark Thomas.

Physiological and growth responses of mamey sapote (Pouteria sapota) to flooding. - 144 p.

Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 3846.

Thesis (Ph.D.)--University of Florida, 2009.

Physiology and growth responses of mamey sapote (Pouteria sapota ) trees to low oxygen in the root zone were examined. For trees in containers, stomatal conductance and net CO2 assimilation decreased within 3 d of flooding, leaf epinasty occurred between days 5 to 10, leaf senescence and abscission occurred between days 15 to 30, branch dieback and tree mortality occurred between days 30 to 60. Three cycles of 3-d flooding and 3-d recovery in containers had little effect on leaf gas exchange of 'Magana' trees. 'Pantin' trees tolerated 3 cycles of 6-d flooding interspersed with 3 to 6 d of recovery despite consistent declines in stomatal conductance and net CO2 assimilation during flooding. In the field, non-root rot infested mamey sapote trees exhibited good tolerance to flooding during fall-winter and less tolerance during the warmer spring-summer period in which tree decline and death occurred, if coupled with root rot. Physiological responses and survival of Pouteria sapota trees were assessed in response to three different oxygen concentrations in the root zone, including an aerated hydroponic treatment (7--8 mg O2 · L-1 H2O), an O2-purged hydroponic treatment (0--1 mg O2 · L-1 H2O), and an aeroponic treatment (&sim;150 mg O2 · L-1 air). Roots in the O2-purged hydroponic treatment evolved significantly higher levels of CO2, developed a glycolysis rate 5 to 10 times higher, and produced levels of ATP similar to those in the aerated hydroponic treatment. Although root alcohol dehydrogenase (ADH) activity was detected in all treatments, there were no observable trends of ADH up-regulation or down-regulation common to all trials or treatments. Development of hypertrophic stem lenticels appeared to be a response to high moisture levels rather than lack of oxygen in the root zone because they developed on all of trees in the aeroponic treatment, some trees in the aerated hydroponic treatment and fewer trees in the O2-purged hydroponic treatment. Alcohol dehydrogenase activity alone was not sufficient to ensure P. sapota survival when oxygen concentrations in the root zone were low, but other leaf responses and morphological developments may be necessary for long term survival in flooded soil.

ISBN: 9781109280586Subjects--Topical Terms:

1017825
Biology, Botany.

Physiological and growth responses of mamey sapote (Pouteria sapota) to flooding.
LDR:03233nam 2200301 4500 001 1397864
005 20110907152207.5
008 130515s2009 ||||||||||||||||| ||eng d
020 $a 9781109280586
035 $a (UMI)AAI3367566
035 $a AAI3367566
040 $a UMI $c UMI
100 1 $a Nickum, Mark Thomas. $3 1676723
245 1 0 $a Physiological and growth responses of mamey sapote (Pouteria sapota) to flooding.
300 $a 144 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 3846.
500 $a Advisers: Jonathan H. Crane; Bruce A. Schaffer.
502 $a Thesis (Ph.D.)--University of Florida, 2009.
520 $a Physiology and growth responses of mamey sapote (Pouteria sapota ) trees to low oxygen in the root zone were examined. For trees in containers, stomatal conductance and net CO2 assimilation decreased within 3 d of flooding, leaf epinasty occurred between days 5 to 10, leaf senescence and abscission occurred between days 15 to 30, branch dieback and tree mortality occurred between days 30 to 60. Three cycles of 3-d flooding and 3-d recovery in containers had little effect on leaf gas exchange of 'Magana' trees. 'Pantin' trees tolerated 3 cycles of 6-d flooding interspersed with 3 to 6 d of recovery despite consistent declines in stomatal conductance and net CO2 assimilation during flooding. In the field, non-root rot infested mamey sapote trees exhibited good tolerance to flooding during fall-winter and less tolerance during the warmer spring-summer period in which tree decline and death occurred, if coupled with root rot. Physiological responses and survival of Pouteria sapota trees were assessed in response to three different oxygen concentrations in the root zone, including an aerated hydroponic treatment (7--8 mg O2 · L-1 H2O), an O2-purged hydroponic treatment (0--1 mg O2 · L-1 H2O), and an aeroponic treatment (&sim;150 mg O2 · L-1 air). Roots in the O2-purged hydroponic treatment evolved significantly higher levels of CO2, developed a glycolysis rate 5 to 10 times higher, and produced levels of ATP similar to those in the aerated hydroponic treatment. Although root alcohol dehydrogenase (ADH) activity was detected in all treatments, there were no observable trends of ADH up-regulation or down-regulation common to all trials or treatments. Development of hypertrophic stem lenticels appeared to be a response to high moisture levels rather than lack of oxygen in the root zone because they developed on all of trees in the aeroponic treatment, some trees in the aerated hydroponic treatment and fewer trees in the O2-purged hydroponic treatment. Alcohol dehydrogenase activity alone was not sufficient to ensure P. sapota survival when oxygen concentrations in the root zone were low, but other leaf responses and morphological developments may be necessary for long term survival in flooded soil.
590 $a School code: 0070.
650 4 $a Biology, Botany. $3 1017825
650 4 $a Agriculture, Horticulture. $3 1017832
650 4 $a Biology, Plant Physiology. $3 1017865
690 $a 0309
690 $a 0471
690 $a 0817
710 2 $a University of Florida. $3 718949
773 0 $t Dissertation Abstracts International $g 70-07B.
790 1 0 $a Crane, Jonathan H., $e advisor
790 1 0 $a Schaffer, Bruce A., $e advisor
790 $a 0070
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3367566