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 Anatomical Respons...

Cuneo Arratia, Italo F.

FindBook

Google Book

Amazon

博客來

Physiological and Anatomical Responses of Grapevine Roots to Drought Stress and Recovering after Re-watering.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Physiological and Anatomical Responses of Grapevine Roots to Drought Stress and Recovering after Re-watering./
作者:	Cuneo Arratia, Italo F.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	121 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
Contained By:	Dissertation Abstracts International79-01B(E).
標題:	Plant sciences. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10278888
ISBN:	9780355150582

Physiological and Anatomical Responses of Grapevine Roots to Drought Stress and Recovering after Re-watering.
Cuneo Arratia, Italo F.

Physiological and Anatomical Responses of Grapevine Roots to Drought Stress and Recovering after Re-watering. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 121 p.

Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.

Thesis (Ph.D.)--University of California, Davis, 2017.

In this dissertation, root systems of different grapevine rootstocks have been examined in their response to drought and re-watering and in their ability to take up water through woody roots. Fine roots are commonly thought to be a weak link in the soil-plant-atmosphere continuum, capable of breaking the water transport pathway in conditions of drought stress. However, the exact site and the sequence of this dysfunction is not known. In the first chapter, we utilized x-ray microtomography (microCT) to explore in vivo changes in structure and embolism formation, and we complemented these studies with hydraulic experiments to test how the hydraulic properties of the radial pathway were affected by drought. We found that lacunae formation in fine root cortical cells, and not embolism formation, is the initial and primary driver of reduced fine root hydraulic conductivity (Lp r). After re-watering, we found no recovery of Lpr, even though the stem water potentials (Psistem) and stomatal conductance did recover. In the third chapter, we hypothesized that when root systems have limited amounts of fine roots, some water uptake must happen through suberized woody roots. Using microCT and hydraulic measurements, we found that when water is delivered to suberized woody roots, hydration of the bark occurs first and is then followed by water absorption in the xylem and embolism removal (&sim;20% of vessels refilling completely within 15 h). Hydraulic experiments showed that while Lpr of suberized woody roots is 0.7% of the Lpr found in fine roots, woody roots are still conductive and water uptake can occur when fine roots are absent. For the fourth chapter, two commonly used grapevine rootstocks were tested for their physiological performance under mild to severe drought stress and subsequent recovery. We used neutron radiography (NR), microCT, fluorescent microcopy and hydraulic measurements to get a detailed picture of the physiological mechanisms that might contribute to drought tolerance/susceptibility in grapevine rootstocks. We found that the drought resistant rootstock examined (i.e. 110R) showed a faster decline in Lpr during mild drought stress and a rapid recovery of root elongation and Lp r after re-watering. The observed changes in hydraulic properties coincide with lacunae formation during mild drought stress and with the recovery in root elongation after re-watering. The integration of response to drought and hydraulic recovery after re-watering is important for understanding drought tolerance in grapevine rootstocks.

ISBN: 9780355150582Subjects--Topical Terms:

3173832
Plant sciences.

Physiological and Anatomical Responses of Grapevine Roots to Drought Stress and Recovering after Re-watering.
LDR:03579nmm a2200313 4500 001 2162260
005 20180928111501.5
008 190424s2017 ||||||||||||||||| ||eng d
020 $a 9780355150582
035 $a (MiAaPQ)AAI10278888
035 $a (MiAaPQ)ucdavis:16965
035 $a AAI10278888
040 $a MiAaPQ $c MiAaPQ
100 1 $a Cuneo Arratia, Italo F. $3 3350241
245 1 0 $a Physiological and Anatomical Responses of Grapevine Roots to Drought Stress and Recovering after Re-watering.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 121 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-01(E), Section: B.
500 $a Adviser: Andrew J. McElrone.
502 $a Thesis (Ph.D.)--University of California, Davis, 2017.
520 $a In this dissertation, root systems of different grapevine rootstocks have been examined in their response to drought and re-watering and in their ability to take up water through woody roots. Fine roots are commonly thought to be a weak link in the soil-plant-atmosphere continuum, capable of breaking the water transport pathway in conditions of drought stress. However, the exact site and the sequence of this dysfunction is not known. In the first chapter, we utilized x-ray microtomography (microCT) to explore in vivo changes in structure and embolism formation, and we complemented these studies with hydraulic experiments to test how the hydraulic properties of the radial pathway were affected by drought. We found that lacunae formation in fine root cortical cells, and not embolism formation, is the initial and primary driver of reduced fine root hydraulic conductivity (Lp r). After re-watering, we found no recovery of Lpr, even though the stem water potentials (Psistem) and stomatal conductance did recover. In the third chapter, we hypothesized that when root systems have limited amounts of fine roots, some water uptake must happen through suberized woody roots. Using microCT and hydraulic measurements, we found that when water is delivered to suberized woody roots, hydration of the bark occurs first and is then followed by water absorption in the xylem and embolism removal (&sim;20% of vessels refilling completely within 15 h). Hydraulic experiments showed that while Lpr of suberized woody roots is 0.7% of the Lpr found in fine roots, woody roots are still conductive and water uptake can occur when fine roots are absent. For the fourth chapter, two commonly used grapevine rootstocks were tested for their physiological performance under mild to severe drought stress and subsequent recovery. We used neutron radiography (NR), microCT, fluorescent microcopy and hydraulic measurements to get a detailed picture of the physiological mechanisms that might contribute to drought tolerance/susceptibility in grapevine rootstocks. We found that the drought resistant rootstock examined (i.e. 110R) showed a faster decline in Lpr during mild drought stress and a rapid recovery of root elongation and Lp r after re-watering. The observed changes in hydraulic properties coincide with lacunae formation during mild drought stress and with the recovery in root elongation after re-watering. The integration of response to drought and hydraulic recovery after re-watering is important for understanding drought tolerance in grapevine rootstocks.
590 $a School code: 0029.
650 4 $a Plant sciences. $3 3173832
650 4 $a Physiology. $3 518431
650 4 $a Agriculture. $3 518588
690 $a 0479
690 $a 0719
690 $a 0473
710 2 $a University of California, Davis. $b Viticulture and Enology. $3 3350242
773 0 $t Dissertation Abstracts International $g 79-01B(E).
790 $a 0029
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10278888